Group Leader: Marek Żukowski
The broad aim of the Multiphoton Quantum Optics for Quantum Information Group is to develop theoretical quantum information science of immediate experimental testability as well as to study the fundamental issues like causality, new concepts in theoretical quantum optics, and efficiency of quantum (optical) protocols.
Activity
Specific goals include:
– Operational translation of the schemes prosed by the other groups of ICTQT into experimental optical setups and feasibility studies.
– Direct collaboration with experimental teams of our IQOQI partner as well as other laboratories.
– Investigations concerning device-independent or self-testing quantum communication, quantum information processing schemes, aimed at commercialization.
– Search for new research avenues in quantum optics allowing demonstrations of quantum protocols or various kinds.
– New indicators of non-classicality in quantum optics.
– Application of theoretical/operational/experimental methods of quantum multiphoton interferometry to other processes of potential value for quantum communication and information processing.
– Quantum optical implementations of secure data transmission.
– Theory of optical test of quantum mechanics.
Keywords: quantum optics, multiphoton interferometry, reduction of communication complexity, foundations of quantum physics, quantum information, Bell’s theorem, quantum optical circuits.
Group members
Rajeshwari Shyam Dehedkar
StudentFormer members
Tamoghna Das (post-doc in 2019-2023), Konrad Schlichtholz (PhD student in 2020-2024), Bianka Wołoncewicz (PhD student in 2018-2023), Sujan Vijayaraj (MSc student in 2021-2023), Ray Ganardi (MSc student in 2020), Konrad Schlichtholz (MSc student in 2019-2020), Jacek Gruca (PhD student in 2018-2019)
Publications
2025
- Jay Lawrence, Marcin Markiewicz, and Marek Żukowski. Relational quantum mechanics is still incompatible with quantum mechanics. European Journal for Philosophy of Science, 15(1), 2025. doi:10.1007/s13194-025-00639-3
[BibTeX] [Abstract]
We showed in a recent article (Lawrence et al. 2023. Quantum, 7, 1015), that relative facts (outcomes), a central concept in Relational Quantum Mechanics, are inconsistent with Quantum Mechanics. We proved this by constructing a Wigner-Friend type sequential measurement scenario on a Greenberger-Horne-Zeilinger (GHZ) state of three qubits, and making the following assumption: “if an interpretation of quantum theory introduces some conceptualization of outcomes of a measurement, then probabilities of these outcomes must follow the quantum predictions as given by the Born rule.” Our work has been criticized by Cavalcanti et al. (2023. European Journal for Philosophy of Science, 13(4),55). In this note we show that their critique, based on their own reformulation of our argument, does not apply to our paper. It also raises questions of principle which are not answered within the framework of Relational Quantum Mechanics. © Springer Nature B.V. 2025.
@ARTICLE{Lawrence2025, author = {Lawrence, Jay and Markiewicz, Marcin and Żukowski, Marek}, title = {Relational quantum mechanics is still incompatible with quantum mechanics}, year = {2025}, journal = {European Journal for Philosophy of Science}, volume = {15}, number = {1}, doi = {10.1007/s13194-025-00639-3}, OPTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-105000051687&doi=10.1007%2fs13194-025-00639-3&partnerID=40&md5=bc2e03371f789d7e7b37654d04d3d2f0}, abstract = {We showed in a recent article (Lawrence et al. 2023. Quantum, 7, 1015), that relative facts (outcomes), a central concept in Relational Quantum Mechanics, are inconsistent with Quantum Mechanics. We proved this by constructing a Wigner-Friend type sequential measurement scenario on a Greenberger-Horne-Zeilinger (GHZ) state of three qubits, and making the following assumption: “if an interpretation of quantum theory introduces some conceptualization of outcomes of a measurement, then probabilities of these outcomes must follow the quantum predictions as given by the Born rule.” Our work has been criticized by Cavalcanti et al. (2023. European Journal for Philosophy of Science, 13(4),55). In this note we show that their critique, based on their own reformulation of our argument, does not apply to our paper. It also raises questions of principle which are not answered within the framework of Relational Quantum Mechanics. © Springer Nature B.V. 2025.}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 0; All Open Access, Green Open Access} } - Konrad Schlichtholz. Superresolving optical ruler based on spatial mode demultiplexing for systems evolving under Brownian motion. Physics of Fluids, 37(2), 2025. doi:10.1063/5.0252056
[BibTeX] [Abstract]
The development of super-resolution techniques, i.e., allowing for efficient resolution below the Rayleigh limit, became one of the important branches in contemporary optics and metrology. Recent findings show that perfect spatial mode demultiplexing (SPADE) into Hermite-Gauss modes followed by photon counting enables one to reach the quantum limit of precision in the task of estimation of separation between two weak stationary sources in the sub-Rayleigh regime. In order to check the limitations of the method, various imperfections such as misalignment or crosstalk between the modes were considered. Possible applications of the method in microscopy call for the adaptive measurement scheme, as the position of the measured system can evolve in time, causing non-negligible misalignment. In this paper, we examine the impact of Brownian motion of the center of the system of two weak incoherent sources on adaptive SPADE measurement precision limits. The analysis is carried out using Fisher information, from which the limit of precision can be obtained by Cramér-Rao bound. As a result, we find that Rayleigh’s curse is present in such a scenario; however, SPADE measurement can outperform perfect direct imaging. What is more, a suitable adjustment of the measurement time between alignments allows measurement with near-optimal precision. © 2025 Author(s).
@ARTICLE{Schlichtholz2025, author = {Schlichtholz, Konrad}, title = {Superresolving optical ruler based on spatial mode demultiplexing for systems evolving under Brownian motion}, year = {2025}, journal = {Physics of Fluids}, volume = {37}, number = {2}, doi = {10.1063/5.0252056}, OPTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85218345181&doi=10.1063%2f5.0252056&partnerID=40&md5=7f1ac37a7c4a4974bfa07b848dad92f1}, abstract = {The development of super-resolution techniques, i.e., allowing for efficient resolution below the Rayleigh limit, became one of the important branches in contemporary optics and metrology. Recent findings show that perfect spatial mode demultiplexing (SPADE) into Hermite-Gauss modes followed by photon counting enables one to reach the quantum limit of precision in the task of estimation of separation between two weak stationary sources in the sub-Rayleigh regime. In order to check the limitations of the method, various imperfections such as misalignment or crosstalk between the modes were considered. Possible applications of the method in microscopy call for the adaptive measurement scheme, as the position of the measured system can evolve in time, causing non-negligible misalignment. In this paper, we examine the impact of Brownian motion of the center of the system of two weak incoherent sources on adaptive SPADE measurement precision limits. The analysis is carried out using Fisher information, from which the limit of precision can be obtained by Cramér-Rao bound. As a result, we find that Rayleigh's curse is present in such a scenario; however, SPADE measurement can outperform perfect direct imaging. What is more, a suitable adjustment of the measurement time between alignments allows measurement with near-optimal precision. © 2025 Author(s).}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 0; All Open Access, Green Open Access} }
2024
- Markus Hoffmann, Julian M. Poschenrieder, Massimiliano Incudini, Sylvie Baier, Amelie Fritz, Andreas Maier, Michael Hartung, Christian Hoffmann, Nico Trummer, Klaudia Adamowicz, Mario Picciani, Evelyn Scheibling, Maximilian V. Harl, Ingmar Lesch, Hunor Frey, Simon Kayser, Paul Wissenberg, Leon Schwartz, Leon Hafner, Aakriti Acharya, Lena Hackl, Gordon Grabert, Sung-Gwon Lee, Gyuhyeok Cho, Matthew E. Cloward, Jakub Jankowski, Hye Kyung Lee, Olga Tsoy, Nina Wenke, Anders Gorm Pedersen, Klaus Bønnelykke, Antonio Mandarino, Federico Melograna, Laura Schulz, Héctor Climente-González, Mathias Wilhelm, Luigi Iapichino, Lars Wienbrandt, David Ellinghaus, Kristel Van Steen, Michele Grossi, Priscilla A. Furth, Lothar Hennighausen, Alessandra Di Pierro, Jan Baumbach, Tim Kacprowski, Markus List, and David B. Blumenthal. Network medicine-based epistasis detection in complex diseases: Ready for quantum computing. Nucleic Acids Research, 52(17):10144 – 10160, 2024. doi:10.1093/nar/gkae697
[BibTeX]@ARTICLE{Hoffmann202410144, author = {Hoffmann, Markus and Poschenrieder, Julian M and Incudini, Massimiliano and Baier, Sylvie and Fritz, Amelie and Maier, Andreas and Hartung, Michael and Hoffmann, Christian and Trummer, Nico and Adamowicz, Klaudia and Picciani, Mario and Scheibling, Evelyn and Harl, Maximilian V and Lesch, Ingmar and Frey, Hunor and Kayser, Simon and Wissenberg, Paul and Schwartz, Leon and Hafner, Leon and Acharya, Aakriti and Hackl, Lena and Grabert, Gordon and Lee, Sung-Gwon and Cho, Gyuhyeok and Cloward, Matthew E and Jankowski, Jakub and Lee, Hye Kyung and Tsoy, Olga and Wenke, Nina and Pedersen, Anders Gorm and Bønnelykke, Klaus and Mandarino, Antonio and Melograna, Federico and Schulz, Laura and Climente-González, Héctor and Wilhelm, Mathias and Iapichino, Luigi and Wienbrandt, Lars and Ellinghaus, David and Van Steen, Kristel and Grossi, Michele and Furth, Priscilla A and Hennighausen, Lothar and Di Pierro, Alessandra and Baumbach, Jan and Kacprowski, Tim and List, Markus and Blumenthal, David B}, title = {Network medicine-based epistasis detection in complex diseases: Ready for quantum computing}, year = {2024}, journal = {Nucleic Acids Research}, volume = {52}, number = {17}, pages = {10144 – 10160}, doi = {10.1093/nar/gkae697}, OPTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85204819837&doi=10.1093%2fnar%2fgkae697&partnerID=40&md5=ae861dd7a6f04570e934ff6480f0db55}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 4; All Open Access, Gold Open Access, Green Open Access} } - Marek Winczewski, Antonio Mandarino, Gerardo Suarez, Robert Alicki, and Michał Horodecki. Intermediate-times dilemma for open quantum system: Filtered approximation to the refined weak-coupling limit. Physical Review E, 110(2), 2024. doi:10.1103/PhysRevE.110.024110
[BibTeX]@ARTICLE{Winczewski2024, author = {Winczewski, Marek and Mandarino, Antonio and Suarez, Gerardo and Alicki, Robert and Horodecki, Michał}, title = {Intermediate-times dilemma for open quantum system: Filtered approximation to the refined weak-coupling limit}, year = {2024}, journal = {Physical Review E}, volume = {110}, number = {2}, doi = {10.1103/PhysRevE.110.024110}, OPTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85200440922&doi=10.1103%2fPhysRevE.110.024110&partnerID=40&md5=cec7423eb18ef1b2871036cb6344755f}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 4; All Open Access, Green Open Access} } - André H. A. Malavazi, Borhan Ahmadi, Paweł Mazurek, and Antonio Mandarino. Detuning effects for heat-current control in quantum thermal devices. Physical Review E, 109(6), 2024. doi:10.1103/PhysRevE.109.064146
[BibTeX]@ARTICLE{Malavazi2024, author = {Malavazi, André H. A. and Ahmadi, Borhan and Mazurek, Paweł and Mandarino, Antonio}, title = {Detuning effects for heat-current control in quantum thermal devices}, year = {2024}, journal = {Physical Review E}, volume = {109}, number = {6}, doi = {10.1103/PhysRevE.109.064146}, OPTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85196752048&doi=10.1103%2fPhysRevE.109.064146&partnerID=40&md5=70999b0e93f94782940df5c6b16972c4}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 1; All Open Access, Green Open Access} } - Konrad Schlichtholz and Marcin Markiewicz. Generalization of Gisin’s theorem to quantum fields. New Journal of Physics, 26(2), 2024. doi:10.1088/1367-2630/ad2821
[BibTeX]@ARTICLE{Schlichtholz2024, author = {Schlichtholz, Konrad and Markiewicz, Marcin}, title = {Generalization of Gisin’s theorem to quantum fields}, year = {2024}, journal = {New Journal of Physics}, volume = {26}, number = {2}, doi = {10.1088/1367-2630/ad2821}, OPTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85186126699&doi=10.1088%2f1367-2630%2fad2821&partnerID=40&md5=8514af25d38203ff81c5a7271e1159a3}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 1; All Open Access, Gold Open Access, Green Open Access} } - Giovanni Scala and Antonio Mandarino. Insights into Quantum Contextuality and Bell Nonclassicality: a Study on Random Pure Two-Qubit Systems. International Journal of Theoretical Physics, 63(1), 2024. doi:10.1007/s10773-023-05543-1
[BibTeX]@ARTICLE{Scala2024, author = {Scala, Giovanni and Mandarino, Antonio}, title = {Insights into Quantum Contextuality and Bell Nonclassicality: a Study on Random Pure Two-Qubit Systems}, year = {2024}, journal = {International Journal of Theoretical Physics}, volume = {63}, number = {1}, doi = {10.1007/s10773-023-05543-1}, OPTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85182203787&doi=10.1007%2fs10773-023-05543-1&partnerID=40&md5=005166d8693db1d97824ddb57521316f}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 1; All Open Access, Green Open Access} } - Francesco Pio Barone, Oriel Kiss, Michele Grossi, Sofia Vallecorsa, and Antonio Mandarino. Counterdiabatic optimized driving in quantum phase sensitive models. New Journal of Physics, 26(3), 2024. doi:10.1088/1367-2630/ad313e
[BibTeX]@ARTICLE{Barone2024, author = {Barone, Francesco Pio and Kiss, Oriel and Grossi, Michele and Vallecorsa, Sofia and Mandarino, Antonio}, title = {Counterdiabatic optimized driving in quantum phase sensitive models}, year = {2024}, journal = {New Journal of Physics}, volume = {26}, number = {3}, doi = {10.1088/1367-2630/ad313e}, OPTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85188282567&doi=10.1088%2f1367-2630%2fad313e&partnerID=40&md5=e01ef572ab06005d9bf73237126ecc46}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 8; All Open Access, Gold Open Access, Green Open Access} } - Konrad Schlichtholz and Marcin Markiewicz. Relativistically invariant encoding of quantum information revisited. New Journal of Physics, 26(3), 2024. doi:10.1088/1367-2630/ad2ffe
[BibTeX] [Abstract]
In this work, we provide a detailed analysis of the issue of encoding of quantum information which is invariant with respect to arbitrary Lorentz transformations. We significantly extend already known results and provide compliments where necessary. In particular, we introduce novel schemes for invariant encoding which utilize so-called pair-wise helicity—a physical parameter characterizing pairs of electric-magnetic charges. We also introduce new schemes for ordinary massive and massless particles based on states with fixed total momentum, in contrast to all protocols already proposed, which assumed equal momenta of all the particles involved in the encoding scheme. Moreover, we provide a systematic discussion of already existing protocols and show directly that they are invariant with respect to Lorentz transformations drawn according to any distribution, a fact which was not manifestly shown in previous works. © 2024 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft.
@ARTICLE{Schlichtholz2024, author = {Schlichtholz, Konrad and Markiewicz, Marcin}, title = {Relativistically invariant encoding of quantum information revisited}, year = {2024}, journal = {New Journal of Physics}, volume = {26}, number = {3}, doi = {10.1088/1367-2630/ad2ffe}, OPTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85188026227&doi=10.1088%2f1367-2630%2fad2ffe&partnerID=40&md5=3e55fc1cb9717a4a798f86212e85df0b}, abstract = {In this work, we provide a detailed analysis of the issue of encoding of quantum information which is invariant with respect to arbitrary Lorentz transformations. We significantly extend already known results and provide compliments where necessary. In particular, we introduce novel schemes for invariant encoding which utilize so-called pair-wise helicity—a physical parameter characterizing pairs of electric-magnetic charges. We also introduce new schemes for ordinary massive and massless particles based on states with fixed total momentum, in contrast to all protocols already proposed, which assumed equal momenta of all the particles involved in the encoding scheme. Moreover, we provide a systematic discussion of already existing protocols and show directly that they are invariant with respect to Lorentz transformations drawn according to any distribution, a fact which was not manifestly shown in previous works. © 2024 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft.}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 1; All Open Access, Gold Open Access, Green Open Access} } - Konrad Schlichtholz and Łukasz Rudnicki. Superresolution in separation estimation between two dynamic incoherent sources using spatial demultiplexing. New Journal of Physics, 26(12), 2024. doi:10.1088/1367-2630/ad929d
[BibTeX] [Abstract]
Achieving resolution in the sub-Rayleigh regime (superresolution) is one of the rapidly developing topics in quantum optics and metrology. Recently, it was shown that perfect measurement based on spatial mode demultiplexing (SPADE) in Hermite-Gauss modes allows one to reach the quantum limit of precision for estimation of separation between two weak incoherent stationary sources. Since then, different imperfections such as misalignment or crosstalk between modes have been studied to check how this result translates into more realistic experimental setups. In this paper, we consider another deviation from the perfect setup by discarding the assumption about the stationarity of the sources. This is relevant for example for astrophysical applications where planets necessarily orbit around the star. We analyze two examples of dynamics: rotations and oscillations, showing the robustness of the SPADE-based measurement against them. The analysis is based on Fisher information, which allows one to obtain the precision limit through Cramér-Rao bound. Furthermore, we formulate a measurement algorithm that allows for the reduction of one parameter for estimation (system orientation angle) in the stationary sources scenario, maintaining the measurement precision despite the lack of knowledge about this parameter. © 2024 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft.
@ARTICLE{Schlichtholz2024a, author = {Schlichtholz, Konrad and Rudnicki, Łukasz}, title = {Superresolution in separation estimation between two dynamic incoherent sources using spatial demultiplexing}, year = {2024}, journal = {New Journal of Physics}, volume = {26}, number = {12}, doi = {10.1088/1367-2630/ad929d}, OPTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85211068167&doi=10.1088%2f1367-2630%2fad929d&partnerID=40&md5=34b2c7d6f1620e2cc30c212042370e34}, abstract = {Achieving resolution in the sub-Rayleigh regime (superresolution) is one of the rapidly developing topics in quantum optics and metrology. Recently, it was shown that perfect measurement based on spatial mode demultiplexing (SPADE) in Hermite-Gauss modes allows one to reach the quantum limit of precision for estimation of separation between two weak incoherent stationary sources. Since then, different imperfections such as misalignment or crosstalk between modes have been studied to check how this result translates into more realistic experimental setups. In this paper, we consider another deviation from the perfect setup by discarding the assumption about the stationarity of the sources. This is relevant for example for astrophysical applications where planets necessarily orbit around the star. We analyze two examples of dynamics: rotations and oscillations, showing the robustness of the SPADE-based measurement against them. The analysis is based on Fisher information, which allows one to obtain the precision limit through Cramér-Rao bound. Furthermore, we formulate a measurement algorithm that allows for the reduction of one parameter for estimation (system orientation angle) in the stationary sources scenario, maintaining the measurement precision despite the lack of knowledge about this parameter. © 2024 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft.}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 1; All Open Access, Gold Open Access, Green Open Access} } - Konrad Schlichtholz and Łukasz Rudnicki. Open dynamics of entanglement in mesoscopic bosonic systems. New Journal of Physics, 26(5), 2024. doi:10.1088/1367-2630/ad438a
[BibTeX] [Abstract]
A key issue in quantum information is finding an adequate description of mesoscopic systems that is simpler than full quantum formalism yet retains crucial information about non-classical phenomena like entanglement. In particular, the study of fully bosonic systems undergoing open evolution is of great importance for the advancement of photonic quantum computing and communication. In this paper, we propose a mesoscopic description of such systems based on boson number correlations. This description allows for tracking Markovian open evolution of entanglement of both non-Gaussian and Gaussian states and their sub-Poissonian statistics. It can be viewed as a generalization of the reduced state of the field formalism (Alicki 2019 Entropy 21 705), which by itself does not contain information about entanglement. As our approach adopts the structure of the description of two particles in terms of first quantization, it allows for broad intuitive usage of known tools. Using the proposed formalism, we show the robustness of entanglement against low-temperature damping for four-mode bright squeezed vacuum state and beam-splitted single photon. We also present a generalization of the Mandel Q parameter. Building upon this, we show that the entanglement of the state obtained by beam splitting of a single occupied mode is inherited from sub-Poissonian statistics of the input state. © 2024 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft.
@ARTICLE{Schlichtholz2024aa, author = {Schlichtholz, Konrad and Rudnicki, Łukasz}, title = {Open dynamics of entanglement in mesoscopic bosonic systems}, year = {2024}, journal = {New Journal of Physics}, volume = {26}, number = {5}, doi = {10.1088/1367-2630/ad438a}, OPTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85193610322&doi=10.1088%2f1367-2630%2fad438a&partnerID=40&md5=2169a75f40541f919aef5582259c259a}, abstract = {A key issue in quantum information is finding an adequate description of mesoscopic systems that is simpler than full quantum formalism yet retains crucial information about non-classical phenomena like entanglement. In particular, the study of fully bosonic systems undergoing open evolution is of great importance for the advancement of photonic quantum computing and communication. In this paper, we propose a mesoscopic description of such systems based on boson number correlations. This description allows for tracking Markovian open evolution of entanglement of both non-Gaussian and Gaussian states and their sub-Poissonian statistics. It can be viewed as a generalization of the reduced state of the field formalism (Alicki 2019 Entropy 21 705), which by itself does not contain information about entanglement. As our approach adopts the structure of the description of two particles in terms of first quantization, it allows for broad intuitive usage of known tools. Using the proposed formalism, we show the robustness of entanglement against low-temperature damping for four-mode bright squeezed vacuum state and beam-splitted single photon. We also present a generalization of the Mandel Q parameter. Building upon this, we show that the entanglement of the state obtained by beam splitting of a single occupied mode is inherited from sub-Poissonian statistics of the input state. © 2024 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft.}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 0; All Open Access, Gold Open Access, Green Open Access} } - Jay Lawrence, Marcin Markiewicz, and Marek Żukowski. Comment on Aurélien Drezet’s Defense of Relational Quantum Mechanics. Foundations of Physics, 54(4), 2024. doi:10.1007/s10701-024-00784-4
[BibTeX] [Abstract]
Aurélien Drezet has attempted in Found. Phys. 54(1), 5 (2023) to defend Relational Quantum Mechanics (RQM) against our recent critique, entitled Relational Quantum Mechanics is incompatible with quantum mechanics, published in Quantum 7, 1015 (2023). Drezet not only misrepresents our work, but he also misconstructs the very theory (RQM) that he claims to defend. © The Author(s) 2024.
@ARTICLE{Lawrence2024, author = {Lawrence, Jay and Markiewicz, Marcin and Żukowski, Marek}, title = {Comment on Aurélien Drezet’s Defense of Relational Quantum Mechanics}, year = {2024}, journal = {Foundations of Physics}, volume = {54}, number = {4}, doi = {10.1007/s10701-024-00784-4}, OPTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85197390772&doi=10.1007%2fs10701-024-00784-4&partnerID=40&md5=040eef30f83022b4f142065dfbf2bcbb}, abstract = {Aurélien Drezet has attempted in Found. Phys. 54(1), 5 (2023) to defend Relational Quantum Mechanics (RQM) against our recent critique, entitled Relational Quantum Mechanics is incompatible with quantum mechanics, published in Quantum 7, 1015 (2023). Drezet not only misrepresents our work, but he also misconstructs the very theory (RQM) that he claims to defend. © The Author(s) 2024.}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 0; All Open Access, Hybrid Gold Open Access} }
2023
- Konrad Schlichtholz, Tomasz Linowski, Mattia Walschaers, Nicolas Treps, Lukasz Rudnicki, and Giacomo Sorelli. Practical Tests for Sub-Rayleigh Source Discrimination with Imperfect Demultiplexers. Quantum 2.0: Proceedings Optica Quantum 2.0 Conference and Exhibition, 2023. doi:10.1364/QUANTUM.2023.QTh3A.6
[BibTeX]@CONFERENCE{Schlichtholz2023, author = {Schlichtholz, Konrad and Linowski, Tomasz and Walschaers, Mattia and Treps, Nicolas and Rudnicki, Lukasz and Sorelli, Giacomo}, title = {Practical Tests for Sub-Rayleigh Source Discrimination with Imperfect Demultiplexers}, year = {2023}, journal = {Quantum 2.0: Proceedings Optica Quantum 2.0 Conference and Exhibition}, doi = {10.1364/QUANTUM.2023.QTh3A.6}, OPTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85191428491&doi=10.1364%2fQUANTUM.2023.QTh3A.6&partnerID=40&md5=02656f75a23d5ef8bf921f0a54963908}, type = {Conference paper}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 0} } - Tomasz Linowski, Konrad Schlichtholz, Giacomo Sorelli, Manuel Gessner, Mattia Walschaers, Nicolas Treps, and Lukasz Rudnicki. Application Range of Crosstalk-Affected Spatial Demultiplexing for Resolving Separations Between Unbalanced Sources. Quantum 2.0: Proceedings Optica Quantum 2.0 Conference and Exhibition, 2023. doi:10.1364/QUANTUM.2023.QTh2A.22
[BibTeX]@CONFERENCE{Linowski2023, author = {Linowski, Tomasz and Schlichtholz, Konrad and Sorelli, Giacomo and Gessner, Manuel and Walschaers, Mattia and Treps, Nicolas and Rudnicki, Lukasz}, title = {Application Range of Crosstalk-Affected Spatial Demultiplexing for Resolving Separations Between Unbalanced Sources}, year = {2023}, journal = {Quantum 2.0: Proceedings Optica Quantum 2.0 Conference and Exhibition}, doi = {10.1364/QUANTUM.2023.QTh2A.22}, OPTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85191486331&doi=10.1364%2fQUANTUM.2023.QTh2A.22&partnerID=40&md5=b98b40776d3fee44056f6feb9d994a2c}, type = {Conference paper}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 0; All Open Access, Green Open Access} } - Michele Grossi, Oriel Kiss, Francesco De Luca, Carlo Zollo, Ian Gremese, and Antonio Mandarino. Finite-size criticality in fully connected spin models on superconducting quantum hardware. Physical Review E, 107(2), 2023. doi:10.1103/PhysRevE.107.024113
[BibTeX]@ARTICLE{Grossi2023, author = {Grossi, Michele and Kiss, Oriel and De Luca, Francesco and Zollo, Carlo and Gremese, Ian and Mandarino, Antonio}, title ="{Finite-size criticality in fully connected spin models on superconducting quantum hardware}", year = {2023}, journal = {Physical Review E}, volume = {107}, number = {2}, doi = {10.1103/PhysRevE.107.024113}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85148328086&doi=10.1103%2fPhysRevE.107.024113&partnerID=40&md5=343a5f2bff30ce90e2f459ad8b101f90}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 2; All Open Access, Green Open Access} } - Massimiliano Incudini, Michele Grossi, Andrea Ceschini, Antonio Mandarino, Massimo Panella, Sofia Vallecorsa, and David Windridge. Resource saving via ensemble techniques for quantum neural networks. Quantum Machine Intelligence, 5(2), 2023. doi:10.1007/s42484-023-00126-z
[BibTeX]@ARTICLE{Incudini2023, author = {Incudini, Massimiliano and Grossi, Michele and Ceschini, Andrea and Mandarino, Antonio and Panella, Massimo and Vallecorsa, Sofia and Windridge, David}, title ="{Resource saving via ensemble techniques for quantum neural networks}", year = {2023}, journal = {Quantum Machine Intelligence}, volume = {5}, number = {2}, doi = {10.1007/s42484-023-00126-z}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85173578065&doi=10.1007%2fs42484-023-00126-z&partnerID=40&md5=848726c56a23792552978904f17f53a1}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 0; All Open Access, Green Open Access, Hybrid Gold Open Access} } - Massimiliano Incudini, Michele Grossi, Antonio Mandarino, Sofia Vallecorsa, Alessandra Di Pierro, and David Windridge. The Quantum Path Kernel: A Generalized Neural Tangent Kernel for Deep Quantum Machine Learning. IEEE Transactions on Quantum Engineering, 4, 2023. doi:10.1109/TQE.2023.3287736
[BibTeX]@ARTICLE{Incudini2023aa, author = {Incudini, Massimiliano and Grossi, Michele and Mandarino, Antonio and Vallecorsa, Sofia and Pierro, Alessandra Di and Windridge, David}, title ="{The Quantum Path Kernel: A Generalized Neural Tangent Kernel for Deep Quantum Machine Learning}", year = {2023}, journal = {IEEE Transactions on Quantum Engineering}, volume = {4}, doi = {10.1109/TQE.2023.3287736}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85163536018&doi=10.1109%2fTQE.2023.3287736&partnerID=40&md5=9e8d9333bae58075de9aa14c5c130b1f}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 0; All Open Access, Gold Open Access, Green Open Access} } - Antonio Mandarino and Giovanni Scala. On the Fidelity Robustness of CHSH–Bell Inequality via Filtered Random States. Entropy, 25(1), 2023. doi:10.3390/e25010094
[BibTeX]@ARTICLE{Mandarino2023, author = {Mandarino, Antonio and Scala, Giovanni}, title ="{On the Fidelity Robustness of CHSH–Bell Inequality via Filtered Random States}", year = {2023}, journal = {Entropy}, volume = {25}, number = {1}, doi = {10.3390/e25010094}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85146819535&doi=10.3390%2fe25010094&partnerID=40&md5=ebe61af5476ddda5ed5f36c2c2687acd}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 1; All Open Access, Gold Open Access, Green Open Access} } - Marek Winczewski, Tamoghna Das, John H. Selby, Karol Horodecki, Pawel Horodecki, Lukasz Pankowski, Marco Piani, and Ravishankar Ramanathan. Complete extension: the non-signalling analog of quantum purification. Quantum, 7, 2023. doi:10.22331/q-2023-11-03-1159
[BibTeX]@ARTICLE{Winczewski2023, author = {Winczewski, Marek and Das, Tamoghna and Selby, John H. and Horodecki, Karol and Horodecki, Pawel and Pankowski, Lukasz and Piani, Marco and Ramanathan, Ravishankar}, title ="{Complete extension: the non-signalling analog of quantum purification}", year = {2023}, journal = {Quantum}, volume = {7}, doi = {10.22331/q-2023-11-03-1159}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85176909214&doi=10.22331%2fq-2023-11-03-1159&partnerID=40&md5=450677e25e45ac6240c54772bd1d32f8}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 0; All Open Access, Gold Open Access, Green Open Access} } - Saverio Monaco, Oriel Kiss, Antonio Mandarino, Sofia Vallecorsa, and Michele Grossi. Quantum phase detection generalization from marginal quantum neural network models. Physical Review B, 107(8), 2023. doi:10.1103/PhysRevB.107.L081105
[BibTeX]@ARTICLE{Monaco2023, author = {Monaco, Saverio and Kiss, Oriel and Mandarino, Antonio and Vallecorsa, Sofia and Grossi, Michele}, title ="{Quantum phase detection generalization from marginal quantum neural network models}", year = {2023}, journal = {Physical Review B}, volume = {107}, number = {8}, doi = {10.1103/PhysRevB.107.L081105}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85148334135&doi=10.1103%2fPhysRevB.107.L081105&partnerID=40&md5=812ad0f3f3257a1a37ef2113df27843e}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 7; All Open Access, Green Open Access, Hybrid Gold Open Access} } - Tomasz Linowski, Konrad Schlichtholz, Giacomo Sorelli, Manuel Gessner, Mattia Walschaers, Nicolas Treps, and Łukasz Rudnicki. Application range of crosstalk-affected spatial demultiplexing for resolving separations between unbalanced sources. New Journal of Physics, 25(10), 2023. doi:10.1088/1367-2630/ad0173
[BibTeX]@ARTICLE{Linowski2023aa, author = {Linowski, Tomasz and Schlichtholz, Konrad and Sorelli, Giacomo and Gessner, Manuel and Walschaers, Mattia and Treps, Nicolas and Rudnicki, Łukasz}, title ="{Application range of crosstalk-affected spatial demultiplexing for resolving separations between unbalanced sources}", year = {2023}, journal = {New Journal of Physics}, volume = {25}, number = {10}, doi = {10.1088/1367-2630/ad0173}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85176464801&doi=10.1088%2f1367-2630%2fad0173&partnerID=40&md5=ef862b8e6d14cb1a37136530a6a723c6}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 0; All Open Access, Gold Open Access, Green Open Access} } - Marek Żukowski. A history of quantum entanglement and Bell’s inequality: Theoretical foundations for optical quantum experiments with entangled photons. Europhysics News, 54(1):16-19, 2023. doi:10.1051/epn/2023102
[BibTeX]@ARTICLE{Zukowski202316, author = {Żukowski, Marek}, title ="{A history of quantum entanglement and Bell's inequality: Theoretical foundations for optical quantum experiments with entangled photons}", year = {2023}, journal = {Europhysics News}, volume = {54}, number = {1}, pages = {16-19}, doi = {10.1051/epn/2023102}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85148531051&doi=10.1051%2fepn%2f2023102&partnerID=40&md5=261c81cb625bbd6a2dd723a09043d59e}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 0; All Open Access, Bronze Open Access, Green Open Access} } - Nicolás Gigena, Giovanni Scala, and Antonio Mandarino. Revisited aspects of the local set in CHSH Bell scenario. International Journal of Quantum Information, 21(7), 2023. doi:10.1142/S0219749923400051
[BibTeX]@ARTICLE{Gigena2023, author = {Gigena, Nicolás and Scala, Giovanni and Mandarino, Antonio}, title ="{Revisited aspects of the local set in CHSH Bell scenario}", year = {2023}, journal = {International Journal of Quantum Information}, volume = {21}, number = {7}, doi = {10.1142/S0219749923400051}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85146823397&doi=10.1142%2fS0219749923400051&partnerID=40&md5=81129b9aa487271f1857a6b1a8704e0b}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 1; All Open Access, Green Open Access} } - Tomasz Linowski, Konrad Schlichtholz, and Łukasz Rudnicki. Formal relation between Pegg-Barnett and Paul quantum phase frameworks. Physical Review A, 107(3), 2023. doi:10.1103/PhysRevA.107.033707
[BibTeX]@ARTICLE{Linowski2023ab, author = {Linowski, Tomasz and Schlichtholz, Konrad and Rudnicki, Łukasz}, title ="{Formal relation between Pegg-Barnett and Paul quantum phase frameworks}", year = {2023}, journal = {Physical Review A}, volume = {107}, number = {3}, doi = {10.1103/PhysRevA.107.033707}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85151284955&doi=10.1103%2fPhysRevA.107.033707&partnerID=40&md5=33a169b876fa6ffd925bb735577b6624}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 1; All Open Access, Green Open Access} } - Jay Lawrence, Marcin Markiewicz, and Marek Żukowski. Relative Facts of Relational Quantum Mechanics are Incompatible with Quantum Mechanics. Quantum, 7, 2023. doi:10.22331/Q-2023-05-23-1015
[BibTeX]@ARTICLE{Lawrence2023, author = {Lawrence, Jay and Markiewicz, Marcin and Żukowski, Marek}, title ="{Relative Facts of Relational Quantum Mechanics are Incompatible with Quantum Mechanics}", year = {2023}, journal = {Quantum}, volume = {7}, doi = {10.22331/Q-2023-05-23-1015}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85164435503&doi=10.22331%2fQ-2023-05-23-1015&partnerID=40&md5=bbb8659fedd570652d87d8c9e1357b58}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 1; All Open Access, Gold Open Access, Green Open Access} }
2022
- Tamoghna Das, Marcin Karczewski, Antonio Mandarino, Marcin Markiewicz, Bianka Woloncewicz, and Marek Zukowski. Wave-particle complementarity: Detecting violation of local realism with photon-number resolving weak-field homodyne measurements. New Journal of Physics, 24(3), 2022. doi:10.1088/1367-2630/ac54c8
[BibTeX]@ARTICLE{Das2022, author = {Das, Tamoghna and Karczewski, Marcin and Mandarino, Antonio and Markiewicz, Marcin and Woloncewicz, Bianka and Zukowski, Marek}, title ="{Wave-particle complementarity: Detecting violation of local realism with photon-number resolving weak-field homodyne measurements}", year = {2022}, journal = {New Journal of Physics}, volume = {24}, number = {3}, doi = {10.1088/1367-2630/ac54c8}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85126840402&doi=10.1088%2f1367-2630%2fac54c8&partnerID=40&md5=84280ede6a600a9ca9785aac109102e0}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 8; All Open Access, Gold Open Access, Green Open Access} } - Karol Horodecki, Marek Winczewski, and Siddhartha Das. Fundamental limitations on the device-independent quantum conference key agreement. Physical Review A, 105(2), 2022. doi:10.1103/PhysRevA.105.022604
[BibTeX]@ARTICLE{Horodecki2022aa, author = {Horodecki, Karol and Winczewski, Marek and Das, Siddhartha}, title ="{Fundamental limitations on the device-independent quantum conference key agreement}", year = {2022}, journal = {Physical Review A}, volume = {105}, number = {2}, doi = {10.1103/PhysRevA.105.022604}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85124528144&doi=10.1103%2fPhysRevA.105.022604&partnerID=40&md5=d2f12620f03238c3f285e83900545ec4}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 6; All Open Access, Green Open Access} } - Tamoghna Das, Marcin Karczewski, Antonio Mandarino, Marcin Markiewicz, Bianka Woloncewicz, and Marek Żukowski. Remarks about Bell-nonclassicality of a single photon. Physics Letters, Section A: General, Atomic and Solid State Physics, 435, 2022. doi:10.1016/j.physleta.2022.128031
[BibTeX]@ARTICLE{Das2022aa, author = {Das, Tamoghna and Karczewski, Marcin and Mandarino, Antonio and Markiewicz, Marcin and Woloncewicz, Bianka and Żukowski, Marek}, title ="{Remarks about Bell-nonclassicality of a single photon}", year = {2022}, journal = {Physics Letters, Section A: General, Atomic and Solid State Physics}, volume = {435}, doi = {10.1016/j.physleta.2022.128031}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85126969343&doi=10.1016%2fj.physleta.2022.128031&partnerID=40&md5=c4081abafd2110b02e35750e1dbc45a3}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 7} } - Tamoghna Das, Marcin Karczewski, Antonio Mandarino, Marcin Markiewicz, Bianka Woloncewicz, and Marek Zukowski. Comment on ‘Single particle nonlocality with completely independent reference states’. New Journal of Physics, 24(3), 2022. doi:10.1088/1367-2630/ac55b1
[BibTeX]@ARTICLE{Das2022ab, author = {Das, Tamoghna and Karczewski, Marcin and Mandarino, Antonio and Markiewicz, Marcin and Woloncewicz, Bianka and Zukowski, Marek}, title ="{Comment on 'Single particle nonlocality with completely independent reference states'}", year = {2022}, journal = {New Journal of Physics}, volume = {24}, number = {3}, doi = {10.1088/1367-2630/ac55b1}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85126846427&doi=10.1088%2f1367-2630%2fac55b1&partnerID=40&md5=bffb6920ce2bc6fd8dd66cd6413b8921}, type = {Review}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 6; All Open Access, Gold Open Access, Green Open Access} } - Marek Winczewski, Tamoghna Das, and Karol Horodecki. Limitations on a device-independent key secure against a nonsignaling adversary via squashed nonlocality. Physical Review A, 106(5), 2022. doi:10.1103/PhysRevA.106.052612
[BibTeX]@ARTICLE{Winczewski2022, author = {Winczewski, Marek and Das, Tamoghna and Horodecki, Karol}, title ="{Limitations on a device-independent key secure against a nonsignaling adversary via squashed nonlocality}", year = {2022}, journal = {Physical Review A}, volume = {106}, number = {5}, doi = {10.1103/PhysRevA.106.052612}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85143197902&doi=10.1103%2fPhysRevA.106.052612&partnerID=40&md5=df504f6a753ef8ea1d575ca39bd45b12}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 1; All Open Access, Green Open Access} } - Tamoghna Das, Marcin Karczewski, Antonio Mandarino, Marcin Markiewicz, and Marek Zukowski. Optimal Interferometry for Bell Nonclassicality Induced by a Vacuum-One-Photon Qubit. Physical Review Applied, 18(3), 2022. doi:10.1103/PhysRevApplied.18.034074
[BibTeX]@ARTICLE{Das2022ac, author = {Das, Tamoghna and Karczewski, Marcin and Mandarino, Antonio and Markiewicz, Marcin and Zukowski, Marek}, title ="{Optimal Interferometry for Bell Nonclassicality Induced by a Vacuum-One-Photon Qubit}", year = {2022}, journal = {Physical Review Applied}, volume = {18}, number = {3}, doi = {10.1103/PhysRevApplied.18.034074}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85139319612&doi=10.1103%2fPhysRevApplied.18.034074&partnerID=40&md5=b50e406712a5a4414554d13c1d283925}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 4; All Open Access, Green Open Access} } - Konrad Schlichtholz, Bianka Woloncewicz, and Marek Żukowski. Simplified quantum optical Stokes observables and Bell’s theorem. Scientific Reports, 12(1), 2022. doi:10.1038/s41598-022-14232-8
[BibTeX]@ARTICLE{Schlichtholz2022, author = {Schlichtholz, Konrad and Woloncewicz, Bianka and Żukowski, Marek}, title ="{Simplified quantum optical Stokes observables and Bell’s theorem}", year = {2022}, journal = {Scientific Reports}, volume = {12}, number = {1}, doi = {10.1038/s41598-022-14232-8}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85132106274&doi=10.1038%2fs41598-022-14232-8&partnerID=40&md5=55b8fba051a1c915585b7dad42fa717f}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 1; All Open Access, Gold Open Access, Green Open Access} } - Ayan Patra, Rivu Gupta, Saptarshi Roy, Tamoghna Das, and Aditi Sen(de). Quantum dense coding network using multimode squeezed states of light. Physical Review A, 106(5), 2022. doi:10.1103/PhysRevA.106.052607
[BibTeX]@ARTICLE{Patra2022, author = {Patra, Ayan and Gupta, Rivu and Roy, Saptarshi and Das, Tamoghna and Sen(de), Aditi}, title ="{Quantum dense coding network using multimode squeezed states of light}", year = {2022}, journal = {Physical Review A}, volume = {106}, number = {5}, doi = {10.1103/PhysRevA.106.052607}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85142935972&doi=10.1103%2fPhysRevA.106.052607&partnerID=40&md5=56d1e1d22629238ea55d9478618cfe3f}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 0; All Open Access, Green Open Access} } - Eneet Kaur, Karol Horodecki, and Siddhartha Das. Upper Bounds on Device-Independent Quantum Key Distribution Rates in Static and Dynamic Scenarios. Physical Review Applied, 18(5), 2022. doi:10.1103/PhysRevApplied.18.054033
[BibTeX]@ARTICLE{Kaur2022, author = {Kaur, Eneet and Horodecki, Karol and Das, Siddhartha}, title ="{Upper Bounds on Device-Independent Quantum Key Distribution Rates in Static and Dynamic Scenarios}", year = {2022}, journal = {Physical Review Applied}, volume = {18}, number = {5}, doi = {10.1103/PhysRevApplied.18.054033}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85143195921&doi=10.1103%2fPhysRevApplied.18.054033&partnerID=40&md5=80c7818ec97f36a4a42e4c93c836db62}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 5; All Open Access, Green Open Access} } - Konrad Schlichtholz, Antonio Mandarino, and Marek Żukowski. Bosonic fields in states with undefined particle numbers possess detectable non-contextuality features, plus more. New Journal of Physics, 24(10), 2022. doi:10.1088/1367-2630/ac919e
[BibTeX]@ARTICLE{Schlichtholz2022aa, author = {Schlichtholz, Konrad and Mandarino, Antonio and Żukowski, Marek}, title ="{Bosonic fields in states with undefined particle numbers possess detectable non-contextuality features, plus more}", year = {2022}, journal = {New Journal of Physics}, volume = {24}, number = {10}, doi = {10.1088/1367-2630/ac919e}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85139858013&doi=10.1088%2f1367-2630%2fac919e&partnerID=40&md5=b3006aa848cf347ccc30f59edd68192a}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 2; All Open Access, Gold Open Access, Green Open Access} } - Massimiliano Incudini, Fabio Tarocco, Riccardo Mengoni, Alessandra Di Pierro, and Antonio Mandarino. Computing graph edit distance on quantum devices. Quantum Machine Intelligence, 4(2), 2022. doi:10.1007/s42484-022-00077-x
[BibTeX]@ARTICLE{Incudini2022, author = {Incudini, Massimiliano and Tarocco, Fabio and Mengoni, Riccardo and Di Pierro, Alessandra and Mandarino, Antonio}, title ="{Computing graph edit distance on quantum devices}", year = {2022}, journal = {Quantum Machine Intelligence}, volume = {4}, number = {2}, doi = {10.1007/s42484-022-00077-x}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85137096138&doi=10.1007%2fs42484-022-00077-x&partnerID=40&md5=651095ebbca43147d535f9e0ff6c980f}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 0; All Open Access, Green Open Access, Hybrid Gold Open Access} } - Marcin Karczewski, Giovanni Scala, Antonio Mandarino, Ana Belén Sainz, and Marek Zukowski. Avenues to generalising Bell inequalities. Journal of Physics A: Mathematical and Theoretical, 55(38), 2022. doi:10.1088/1751-8121/ac8a28
[BibTeX]@ARTICLE{Karczewski2022, author = {Karczewski, Marcin and Scala, Giovanni and Mandarino, Antonio and Sainz, Ana Belén and Zukowski, Marek}, title ="{Avenues to generalising Bell inequalities}", year = {2022}, journal = {Journal of Physics A: Mathematical and Theoretical}, volume = {55}, number = {38}, doi = {10.1088/1751-8121/ac8a28}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85138220438&doi=10.1088%2f1751-8121%2fac8a28&partnerID=40&md5=91472f531716936f131024183c514955}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 2; All Open Access, Green Open Access, Hybrid Gold Open Access} } - Antonio Mandarino. Quantum Thermal Amplifiers with Engineered Dissipation. Entropy, 24(8), 2022. doi:10.3390/e24081031
[BibTeX]@ARTICLE{Mandarino2022, author = {Mandarino, Antonio}, title ="{Quantum Thermal Amplifiers with Engineered Dissipation}", year = {2022}, journal = {Entropy}, volume = {24}, number = {8}, doi = {10.3390/e24081031}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85137355076&doi=10.3390%2fe24081031&partnerID=40&md5=277c0f6c44a069133c4be2ea0f2ee4ad}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 2; All Open Access, Gold Open Access, Green Open Access} }
2021
- Časlav Brukner, Marek Żukowski, and Anton Zeilinger. The Essence of Entanglement. Fundamental Theories of Physics, 203:117-138, 2021. doi:10.1007/978-3-030-77367-0_6
[BibTeX]@ARTICLE{Brukner2021117, author = {Brukner, Časlav and Żukowski, Marek and Zeilinger, Anton}, title ="{The Essence of Entanglement}", year = {2021}, journal = {Fundamental Theories of Physics}, volume = {203}, pages = {117-138}, doi = {10.1007/978-3-030-77367-0_6}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85117074344&doi=10.1007%2f978-3-030-77367-0_6&partnerID=40&md5=3447c09e20abc1ff51d48485e652cd3e}, type = {Book chapter}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 2} } - Siddhartha Das, Stefan Bäuml, Marek Winczewski, and Karol Horodecki. Universal Limitations on Quantum Key Distribution over a Network. Physical Review X, 11(4), 2021. doi:10.1103/PhysRevX.11.041016
[BibTeX]@ARTICLE{Das2021, author = {Das, Siddhartha and Bäuml, Stefan and Winczewski, Marek and Horodecki, Karol}, title ="{Universal Limitations on Quantum Key Distribution over a Network}", year = {2021}, journal = {Physical Review X}, volume = {11}, number = {4}, doi = {10.1103/PhysRevX.11.041016}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85119098651&doi=10.1103%2fPhysRevX.11.041016&partnerID=40&md5=6531702c3d9ae85b494c63c589f15ac9}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 32; All Open Access, Gold Open Access, Green Open Access} } - Tamoghna Das, Marcin Karczewski, Antonio Mandarino, Marcin Markiewicz, Bianka Woloncewicz, and Marek Żukowski. Can single photon excitation of two spatially separated modes lead to a violation of Bell inequality via weak-field homodyne measurements?. New Journal of Physics, 23(7), 2021. doi:10.1088/1367-2630/ac0ffe
[BibTeX]@ARTICLE{Das2021aa, author = {Das, Tamoghna and Karczewski, Marcin and Mandarino, Antonio and Markiewicz, Marcin and Woloncewicz, Bianka and Żukowski, Marek}, title ="{Can single photon excitation of two spatially separated modes lead to a violation of Bell inequality via weak-field homodyne measurements?}", year = {2021}, journal = {New Journal of Physics}, volume = {23}, number = {7}, doi = {10.1088/1367-2630/ac0ffe}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85111184777&doi=10.1088%2f1367-2630%2fac0ffe&partnerID=40&md5=7d2df232b1516e52cd5b507837017a0e}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 11; All Open Access, Gold Open Access, Green Open Access} } - Antonio Mandarino, Karl Joulain, Melisa Domínguez Gómez, and Bruno Bellomo. Thermal Transistor Effect in Quantum Systems. Physical Review Applied, 16(3), 2021. doi:10.1103/PhysRevApplied.16.034026
[BibTeX]@ARTICLE{Mandarino2021, author = {Mandarino, Antonio and Joulain, Karl and Gómez, Melisa Domínguez and Bellomo, Bruno}, title ="{Thermal Transistor Effect in Quantum Systems}", year = {2021}, journal = {Physical Review Applied}, volume = {16}, number = {3}, doi = {10.1103/PhysRevApplied.16.034026}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85115893158&doi=10.1103%2fPhysRevApplied.16.034026&partnerID=40&md5=5f401bc5be71e7136e91db023491f160}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 11; All Open Access, Green Open Access} } - Konrad Schlichtholz, Bianka Woloncewicz, and Marek Zukowski. Nonclassicality of bright Greenberger-Horne-Zeilinger-like radiation of an optical parametric source. Physical Review A, 103(4), 2021. doi:10.1103/PhysRevA.103.042226
[BibTeX]@ARTICLE{Schlichtholz2021, author = {Schlichtholz, Konrad and Woloncewicz, Bianka and Zukowski, Marek}, title ="{Nonclassicality of bright Greenberger-Horne-Zeilinger-like radiation of an optical parametric source}", year = {2021}, journal = {Physical Review A}, volume = {103}, number = {4}, doi = {10.1103/PhysRevA.103.042226}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85105045644&doi=10.1103%2fPhysRevA.103.042226&partnerID=40&md5=800ecdce062a6e8efb272a232d405618}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 2; All Open Access, Green Open Access} }
2020
- Armin Tavakoli, Marek Żukowski, and Časlav Brukner. Does violation of a Bell inequality always imply quantum advantage in a communication complexity problem?. Quantum, 4, 2020. doi:10.22331/Q-2020-09-07-316
[BibTeX]@ARTICLE{Tavakoli2020, author = {Tavakoli, Armin and Żukowski, Marek and Brukner, Časlav}, title ="{Does violation of a Bell inequality always imply quantum advantage in a communication complexity problem?}", year = {2020}, journal = {Quantum}, volume = {4}, doi = {10.22331/Q-2020-09-07-316}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85091899804&doi=10.22331%2fQ-2020-09-07-316&partnerID=40&md5=9a416f2e4eb210e97695b89b79387795}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 11; All Open Access, Gold Open Access, Green Open Access} } - Saptarshi Roy, Tamoghna Das, and Aditi Sen(de). Computable genuine multimode entanglement measure: Gaussian versus non-Gaussian. Physical Review A, 102(1), 2020. doi:10.1103/PhysRevA.102.012421
[BibTeX]@ARTICLE{Roy2020, author = {Roy, Saptarshi and Das, Tamoghna and Sen(de), Aditi}, title ="{Computable genuine multimode entanglement measure: Gaussian versus non-Gaussian}", year = {2020}, journal = {Physical Review A}, volume = {102}, number = {1}, doi = {10.1103/PhysRevA.102.012421}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85089469408&doi=10.1103%2fPhysRevA.102.012421&partnerID=40&md5=465bd4e25728f64e54e236b03269c33a}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 4; All Open Access, Green Open Access} } - Saptarshi Roy, Tamoghna Das, Debmalya Das, Aditi Sen(De), and Ujjwal Sen. How efficient is transport of quantum cargo through multiple highways?. Annals of Physics, 422, 2020. doi:10.1016/j.aop.2020.168281
[BibTeX]@ARTICLE{Roy2020aa, author = {Roy, Saptarshi and Das, Tamoghna and Das, Debmalya and Sen(De), Aditi and Sen, Ujjwal}, title ="{How efficient is transport of quantum cargo through multiple highways?}", year = {2020}, journal = {Annals of Physics}, volume = {422}, doi = {10.1016/j.aop.2020.168281}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85092224951&doi=10.1016%2fj.aop.2020.168281&partnerID=40&md5=22f4f5a5ad467f1d7b6b0a0b4516e6d8}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 4; All Open Access, Green Open Access} }
2019
- Junghee Ryu, Bianka Woloncewicz, Marcin Marciniak, Marcin Wieśniak, and Marek Żukowski. General mapping of multiqudit entanglement conditions to nonseparability indicators for quantum-optical fields. Physical Review Research, 1(3), 2019. doi:10.1103/PhysRevResearch.1.032041
[BibTeX]@ARTICLE{Ryu2019, author = {Ryu, Junghee and Woloncewicz, Bianka and Marciniak, Marcin and Wieśniak, Marcin and Żukowski, Marek}, title ="{General mapping of multiqudit entanglement conditions to nonseparability indicators for quantum-optical fields}", year = {2019}, journal = {Physical Review Research}, volume = {1}, number = {3}, doi = {10.1103/PhysRevResearch.1.032041}, OTurl = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85101953615&doi=10.1103%2fPhysRevResearch.1.032041&partnerID=40&md5=7191d908d1afc84dc9062c000ee01d41}, type = {Article}, publication_stage = {Final}, source = {Scopus}, OPTnote = {Cited by: 3; All Open Access, Gold Open Access, Green Open Access} }
arXiv preprints
2024
- André H. A. Malavazi, Borhan Ahmadi, Paweł Mazurek, and Antonio Mandarino. Unveiling Detuning Effects for Heat-Current Control in Quantum Thermal Devices. , 2024.
[BibTeX]@article{malavazi2024unveiling, title={Unveiling Detuning Effects for Heat-Current Control in Quantum Thermal Devices}, author={André H. A. Malavazi and Borhan Ahmadi and Paweł Mazurek and Antonio Mandarino}, year={2024}, eprint={2402.16721}, archivePrefix={arXiv}, OPTprimaryClass={id='quant-ph' full_name='Quantum Physics' is_active=True alt_name=None in_archive='quant-ph' is_general=False description=None} }
2023
- Paulo J. Cavalcanti, Giovanni Scala, Antonio Mandarino, and Cosmo Lupo. Information theoretical perspective on the method of Entanglement Witnesses. arXiv, 2023.
[BibTeX]@article{cavalcanti2023information, title={Information theoretical perspective on the method of Entanglement Witnesses}, author={Cavalcanti, Paulo J and Scala, Giovanni and Mandarino, Antonio and Lupo, Cosmo}, journal={arXiv}, year={2023}, keywords={arnp}, addendum={arXiv:2308.07744. Funded by MAB ICTQT.}, OPTurl = {https://doi.org/10.48550/arXiv.2308.07744} }
2022
- Saverio Monaco, Oriel Kiss, Antonio Mandarino, Sofia Vallecorsa, and Michele Grossi. Quantum phase detection generalisation from marginal quantum neural network models. , 2022. doi:10.48550/ARXIV.2208.08748
[BibTeX] [Download PDF]@article{QCNN_ANNNI, doi = {10.48550/ARXIV.2208.08748}, url = {https://arxiv.org/abs/2208.08748}, author = {Monaco, Saverio and Kiss, Oriel and Mandarino, Antonio and Vallecorsa, Sofia and Grossi, Michele}, keywords = {Quantum Physics (quant-ph), FOS: Physical sciences, FOS: Physical sciences}, title = {Quantum phase detection generalisation from marginal quantum neural network models}, publisher = {arXiv}, year = {2022}, copyright = {arXiv.org perpetual, non-exclusive license} } - Michele Grossi, Oriel Kiss, Francesco De Luca, Carlo Zollo, Ian Gremese, and Antonio Mandarino. Finite-size criticality in fully connected spin models on superconducting quantum hardware. , 2022. doi:10.48550/ARXIV.2208.02731
[BibTeX] [Download PDF]@article{VQE_LMG, doi = {10.48550/ARXIV.2208.02731}, url = {https://arxiv.org/abs/2208.02731}, author = {Grossi, Michele and Kiss, Oriel and De Luca, Francesco and Zollo, Carlo and Gremese, Ian and Mandarino, Antonio}, keywords = {Quantum Physics (quant-ph), Statistical Mechanics (cond-mat.stat-mech), FOS: Physical sciences, FOS: Physical sciences}, title = {Finite-size criticality in fully connected spin models on superconducting quantum hardware}, publisher = {arXiv}, year = {2022}, copyright = {arXiv.org perpetual, non-exclusive license} } - Konrad Schlichtholz, Antonio Mandarino, and Marek Żukowski. Bosonic fields in states with undefined particle numbers possess detectable non-contextuality features, plus more . arXiv e-prints, pages arXiv.2205.09440, 2022.
[BibTeX] [Abstract]
Most of the paradoxical, for the classical intuition, features of quantum theory were formulated for situations which involve a fixed number of particles. While one can now find a formulation of Bell’s theorem for quantum fields, a Kochen-Specker-type reasoning is usually formulated for just one particle, or like in the case of Peres-Mermin square for two. A question emerges. Is it possible to formulate a contextuality proof for situation in which the numbers of particles are fundamentally undefined? We address this problem for bosonic fields. We introduce a representation of the su(2) algebra in terms of boson number states in two modes that allows us to assess nonclassicality of states of bosonic fields. As a figure of merit of a nonclassical behaviour we analyze first of all contextuality, and we show that the introduced observables are handy and efficient to reveal violation of local realism, and to formulate entanglement indicators. We construct a method which extends the Kochen-Specker contextuality to bosonic quantum fields. A form of an inequality is derived using a suitable version of the Peres-Mermin square. The entanglement indicators use a witness built with specially defined Pauli-like observables. Finally, Bell-nonclassicality is discussed: an inequality that involves the expectation values of pairs of the Pauli-like operators is presented. The introduced indicators are shown to be effective, e.g. they reveal nonclassicality in situaations involving undefined boson numbers. This is shown via quantum optical examples of the 2×2 bright squeezed vacuum state, and a recently discussed bright-GHZ state resulting from multiple three photon emissions in a parametric process.
@Article{Schlichtholz2022, author = { Schlichtholz, Konrad and Mandarino, Antonio and Żukowski, Marek }, journal = {arXiv e-prints}, title = { Bosonic fields in states with undefined particle numbers possess detectable non-contextuality features, plus more }, year = {2022}, OPTmonth = may, pages = {arXiv.2205.09440}, abstract = { Most of the paradoxical, for the classical intuition, features of quantum theory were formulated for situations which involve a fixed number of particles. While one can now find a formulation of Bell's theorem for quantum fields, a Kochen-Specker-type reasoning is usually formulated for just one particle, or like in the case of Peres-Mermin square for two. A question emerges. Is it possible to formulate a contextuality proof for situation in which the numbers of particles are fundamentally undefined? We address this problem for bosonic fields. We introduce a representation of the su(2) algebra in terms of boson number states in two modes that allows us to assess nonclassicality of states of bosonic fields. As a figure of merit of a nonclassical behaviour we analyze first of all contextuality, and we show that the introduced observables are handy and efficient to reveal violation of local realism, and to formulate entanglement indicators. We construct a method which extends the Kochen-Specker contextuality to bosonic quantum fields. A form of an inequality is derived using a suitable version of the Peres-Mermin square. The entanglement indicators use a witness built with specially defined Pauli-like observables. Finally, Bell-nonclassicality is discussed: an inequality that involves the expectation values of pairs of the Pauli-like operators is presented. The introduced indicators are shown to be effective, e.g. they reveal nonclassicality in situaations involving undefined boson numbers. This is shown via quantum optical examples of the 2×2 bright squeezed vacuum state, and a recently discussed bright-GHZ state resulting from multiple three photon emissions in a parametric process. }, archiveprefix = {arXiv}, eid = {arXiv.2205.09440}, eprint = {2205.09440}, keywords = {Quantum Physics, Physical sciences }, primaryclass = {quant-ph}, OPTurl = {https://arxiv.org/abs/2205.09440}, } - Tomasz Linowski, Konrad Schlichtholz, and Łukasz Rudnicki. A formal relation between Pegg-Barnett and Paul quantum phase frameworks. arXiv e-prints, pages arXiv.2205.09481, 2022.
[BibTeX] [Abstract]
The problem of defining a Hermitian quantum phase operator is nearly as old as quantum mechanics itself. Throughout the years, a number of solutions was proposed, ranging from abstract operator formalisms to phase-space methods. In this work, we connect two of the most prominent approaches: Pegg-Barnett and Paul formalisms, by proving that the Paul formalism is equivalent to the Pegg-Barnett formalism applied to an infinitely amplified state. Our findings fill in a conceptual gap in the understanding of the quantum phase problem.
@Article{Linowski2022, author = {Linowski, Tomasz and Schlichtholz, Konrad and Rudnicki, Łukasz}, journal = {arXiv e-prints}, title = {A formal relation between Pegg-Barnett and Paul quantum phase frameworks}, year = {2022}, OPTmonth = may, pages = {arXiv.2205.09481}, abstract = {The problem of defining a Hermitian quantum phase operator is nearly as old as quantum mechanics itself. Throughout the years, a number of solutions was proposed, ranging from abstract operator formalisms to phase-space methods. In this work, we connect two of the most prominent approaches: Pegg-Barnett and Paul formalisms, by proving that the Paul formalism is equivalent to the Pegg-Barnett formalism applied to an infinitely amplified state. Our findings fill in a conceptual gap in the understanding of the quantum phase problem.}, archiveprefix = {arXiv}, eid = {arXiv.2205.09481}, eprint = {2205.09481}, keywords = {Quantum Physics, Physical sciences}, primaryclass = {quant-ph}, OPTurl = {https://arxiv.org/abs/2205.09481}, } - Jay Lawrence, Marcin Markiewicz, and Marek Żukowski. Relative facts do not exist. Relational Quantum Mechanics is Incompatible with Quantum Mechanics. arXiv preprint arXiv:2208.11793, 2022.
[BibTeX]@article{Lawrence22RQM, title={Relative facts do not exist. {Relational Quantum Mechanics is Incompatible with Quantum Mechanics}}, author={Lawrence, Jay and Markiewicz, Marcin and Żukowski, Marek}, journal={arXiv preprint arXiv:2208.11793}, year={2022} }
2021
- Tamoghna Das, Marcin Karczewski, Antonio Mandarino, Marcin Markiewicz, Bianka Woloncewicz, and Marek Żukowski. No-go for device independent protocols with Tan-Walls-Collett `nonlocality of a single photon’. arXiv:2102.03254 [quant-ph], 2021. arXiv: 2102.03254
[BibTeX] [Abstract]
We investigate the interferometric scheme put forward by Tan, Walls and Collett [Phys. Rev. Lett. \\textbackslashbf 66\, 256 (1991)] that aims to reveal Bell non-classicality of a single photon. By providing a local hidden variable model that reproduces their results, we decisively refute this claim. In particular, this means that the scheme cannot be used in device-independent protocols.
@article{das_no-go_2021, title = {No-go for device independent protocols with {Tan}-{Walls}-{Collett} `nonlocality of a single photon'}, OPTurl = {http://arxiv.org/abs/2102.03254}, abstract = {We investigate the interferometric scheme put forward by Tan, Walls and Collett [Phys. Rev. Lett. \{{\textbackslash}bf 66\}, 256 (1991)] that aims to reveal Bell non-classicality of a single photon. By providing a local hidden variable model that reproduces their results, we decisively refute this claim. In particular, this means that the scheme cannot be used in device-independent protocols.}, OPTurldate = {2021-07-28}, journal = {arXiv:2102.03254 [quant-ph]}, author = {Das, Tamoghna and Karczewski, Marcin and Mandarino, Antonio and Markiewicz, Marcin and Woloncewicz, Bianka and Żukowski, Marek}, OPTmonth = feb, year = {2021}, note = {arXiv: 2102.03254}, keywords = {Quantum Physics}, } - Tamoghna Das, Marcin Karczewski, Antonio Mandarino, Marcin Markiewicz, Bianka Woloncewicz, and Marek Zukowski. Can single photon excitation of two spatially separated modes lead to a violation of Bell inequality via homodyne measurements?. arXiv:2102.06689 [quant-ph], 2021. arXiv: 2102.06689
[BibTeX] [Abstract]
We reconsider the all-optical homodyne-measurement based experimental schemes that aim to reveal Bell nonclassicality of a single photon, often termed `nonlocality’. We focus on the schemes put forward by Tan, Walls and Collett (TWC, 1991) and Hardy (1994). In the light of our previous work the Tan, Walls and Collett setup can be described by a precise local hidden variable model, hence the claimed nonclassicality of this proposal is apparent, whereas the nonclassicality proof proposed by Hardy is impeccable. In this work we resolve the following problem: which feature of the Hardy’s approach is crucial for its successful confirmation of nonclassicality. The scheme of Hardy differs from the Tan, Walls and Collett setup in two aspects. (i) It introduces a superposition of a single photon excitation with vacuum as the initial state of one of the input modes of a 50-50 beamsplitter, which creates the superposition state of two separable (exit) modes under investigation. (ii) In the final measurements Hardy’s proposal utilises a varying strengths of the local oscillator fields, whereas in the TWC case they are constant. In fact the local oscillators in Hardy’s scheme are either on or off (the local setting is specified by the presence or absence of the local auxiliary field). We show that it is the varying strength of the local oscillators, from setting to setting, which is the crucial feature enabling violation of local realism in the Hardy setup, whereas it is not necessary to use initial superposition of a single photon excitation with vacuum as the initial state of the input mode. Neither one needs to operate in the fully on/off detection scheme. Despite the failure of the Tan, Walls and Collett scheme in proving Bell nonclassicality, we show that their scheme can serve as an entanglement indicator.
@article{das_can_2021, title = {Can single photon excitation of two spatially separated modes lead to a violation of {Bell} inequality via homodyne measurements?}, author = {Das, Tamoghna and Karczewski, Marcin and Mandarino, Antonio and Markiewicz, Marcin and Woloncewicz, Bianka and Zukowski, Marek}, OPTurl = {http://arxiv.org/abs/2102.06689}, abstract = {We reconsider the all-optical homodyne-measurement based experimental schemes that aim to reveal Bell nonclassicality of a single photon, often termed `nonlocality'. We focus on the schemes put forward by Tan, Walls and Collett (TWC, 1991) and Hardy (1994). In the light of our previous work the Tan, Walls and Collett setup can be described by a precise local hidden variable model, hence the claimed nonclassicality of this proposal is apparent, whereas the nonclassicality proof proposed by Hardy is impeccable. In this work we resolve the following problem: which feature of the Hardy's approach is crucial for its successful confirmation of nonclassicality. The scheme of Hardy differs from the Tan, Walls and Collett setup in two aspects. (i) It introduces a superposition of a single photon excitation with vacuum as the initial state of one of the input modes of a 50-50 beamsplitter, which creates the superposition state of two separable (exit) modes under investigation. (ii) In the final measurements Hardy's proposal utilises a varying strengths of the local oscillator fields, whereas in the TWC case they are constant. In fact the local oscillators in Hardy's scheme are either on or off (the local setting is specified by the presence or absence of the local auxiliary field). We show that it is the varying strength of the local oscillators, from setting to setting, which is the crucial feature enabling violation of local realism in the Hardy setup, whereas it is not necessary to use initial superposition of a single photon excitation with vacuum as the initial state of the input mode. Neither one needs to operate in the fully on/off detection scheme. Despite the failure of the Tan, Walls and Collett scheme in proving Bell nonclassicality, we show that their scheme can serve as an entanglement indicator.}, OPTurldate = {2021-07-28}, journal = {arXiv:2102.06689 [quant-ph]}, OPTmonth = feb, year = {2021}, note = {arXiv: 2102.06689}, keywords = {Quantum Physics}, } - Tamoghna Das, Marcin Karczewski, Antonio Mandarino, Marcin Markiewicz, Bianka Woloncewicz, and Marek Żukowski. On detecting violation of local realism with photon-number resolving weak-field homodyne measurements. arXiv:2104.10703 [quant-ph], 2021. arXiv: 2104.10703
[BibTeX] [Abstract]
Non-existence of a local hidden variables (LHV) model for a phenomenon benchmarks its use in device-independent quantum protocols. Nowadays photon-number resolving weak-field homodyne measurements allow realization of emblematic gedanken experiments. Alas, claims that we can have no LHV models for such experiments on (a) excitation of a pair of spatial modes by a single photon, and (b) two spatial modes in a weakly squeezed vacuum state, involving constant local oscillator strengths, are unfounded. For (a) an exact LHV model resolves the dispute on the “non-locality of a single photon” in its original formulation. It is measurements with local oscillators on or off that do not have LHV models.
@article{das_detecting_2021, title = {On detecting violation of local realism with photon-number resolving weak-field homodyne measurements}, OPTurl = {http://arxiv.org/abs/2104.10703}, abstract = {Non-existence of a local hidden variables (LHV) model for a phenomenon benchmarks its use in device-independent quantum protocols. Nowadays photon-number resolving weak-field homodyne measurements allow realization of emblematic gedanken experiments. Alas, claims that we can have no LHV models for such experiments on (a) excitation of a pair of spatial modes by a single photon, and (b) two spatial modes in a weakly squeezed vacuum state, involving constant local oscillator strengths, are unfounded. For (a) an exact LHV model resolves the dispute on the "non-locality of a single photon" in its original formulation. It is measurements with local oscillators on or off that do not have LHV models.}, OPTurldate = {2021-07-28}, journal = {arXiv:2104.10703 [quant-ph]}, author = {Das, Tamoghna and Karczewski, Marcin and Mandarino, Antonio and Markiewicz, Marcin and Woloncewicz, Bianka and Żukowski, Marek}, OPTmonth = apr, year = {2021}, note = {arXiv: 2104.10703}, keywords = {Quantum Physics}, } - Massimiliano Incudini, Fabio Tarocco, Riccardo Mengoni, Alessandra Di Pierro, and Antonio Mandarino. Benchmarking Small-Scale Quantum Devices on Computing Graph Edit Distance. arXiv e-prints, pages arXiv:2111.10183, 2021.
[BibTeX] [Abstract]
Distance measures provide the foundation for many popular algorithms in Machine Learning and Pattern Recognition. Different notions of distance can be used depending on the types of the data the algorithm is working on. For graph-shaped data, an important notion is the Graph Edit Distance (GED) that measures the degree of (dis)similarity between two graphs in terms of the operations needed to make them identical. As the complexity of computing GED is the same as NP-hard problems, it is reasonable to consider approximate solutions. In this paper we present a comparative study of two quantum approaches to computing GED: quantum annealing and variational quantum algorithms, which refer to the two types of quantum hardware currently available, namely quantum annealer and gate-based quantum computer, respectively. Considering the current state of noisy intermediate-scale quantum computers, we base our study on proof-of-principle tests of the performance of these quantum algorithms.
@Article{Incudini2021a, author = {Incudini, Massimiliano and Tarocco, Fabio and Mengoni, Riccardo and Di Pierro, Alessandra and Mandarino, Antonio}, journal = {arXiv e-prints}, title = {Benchmarking {S}mall-{S}cale {Q}uantum {D}evices on {C}omputing {G}raph {E}dit {D}istance}, year = {2021}, OPTmonth = nov, pages = {arXiv:2111.10183}, abstract = {Distance measures provide the foundation for many popular algorithms in Machine Learning and Pattern Recognition. Different notions of distance can be used depending on the types of the data the algorithm is working on. For graph-shaped data, an important notion is the Graph Edit Distance (GED) that measures the degree of (dis)similarity between two graphs in terms of the operations needed to make them identical. As the complexity of computing GED is the same as NP-hard problems, it is reasonable to consider approximate solutions. In this paper we present a comparative study of two quantum approaches to computing GED: quantum annealing and variational quantum algorithms, which refer to the two types of quantum hardware currently available, namely quantum annealer and gate-based quantum computer, respectively. Considering the current state of noisy intermediate-scale quantum computers, we base our study on proof-of-principle tests of the performance of these quantum algorithms.}, archiveprefix = {arXiv}, eid = {arXiv:2111.10183}, eprint = {2111.10183}, keywords = {Quantum Physics, Computer Science - Machine Learning}, primaryclass = {quant-ph}, OPTurl = {https://ui.adsabs.harvard.edu/abs/2021arXiv211110183I}, } - Ray Ganardi, Marek Miller, Tomasz Paterek, and Marek Żukowski. Hierarchy of correlation quantifiers comparable to negativity. arXiv e-prints, pages arXiv:2111.11887, 2021.
[BibTeX] [Abstract]
Quantum systems generally exhibit different kinds of correlations. In order to compare them on equal footing, one uses the so-called distance-based approach where different types of correlations are captured by the distance to different set of states. However, these quantifiers are usually hard to compute as their definition involves optimization aiming to find the closest states within the set. On the other hand, negativity is one of the few computable entanglement monotones, but its comparison with other correlations required further justification. Here we place negativity as part of a family of correlation measures that has a distance-based construction. We introduce a suitable distance, discuss the emerging measures and their applications, and compare them to relative entropy-based correlation quantifiers. This work is a step towards correlation measures that are simultaneously comparable and computable.
@Article{Ganardi2021, author = {Ganardi, Ray and Miller, Marek and Paterek, Tomasz and {\.Z}ukowski, Marek}, journal = {arXiv e-prints}, title = {Hierarchy of correlation quantifiers comparable to negativity}, year = {2021}, OPTmonth = nov, pages = {arXiv:2111.11887}, abstract = {Quantum systems generally exhibit different kinds of correlations. In order to compare them on equal footing, one uses the so-called distance-based approach where different types of correlations are captured by the distance to different set of states. However, these quantifiers are usually hard to compute as their definition involves optimization aiming to find the closest states within the set. On the other hand, negativity is one of the few computable entanglement monotones, but its comparison with other correlations required further justification. Here we place negativity as part of a family of correlation measures that has a distance-based construction. We introduce a suitable distance, discuss the emerging measures and their applications, and compare them to relative entropy-based correlation quantifiers. This work is a step towards correlation measures that are simultaneously comparable and computable.}, archiveprefix = {arXiv}, eid = {arXiv:2111.11887}, eprint = {2111.11887}, keywords = {Quantum Physics}, primaryclass = {quant-ph}, OPTurl = {https://ui.adsabs.harvard.edu/abs/2021arXiv211111887G}, } - Marek Winczewski, Antonio Mandarino, Michał Horodecki, and Robert Alicki. Bypassing the Intermediate Times Dilemma for Open Quantum System. , 2021. doi:10.48550/ARXIV.2106.05776
[BibTeX]@article{arXiv_Bypasing_Dillema, doi = {10.48550/ARXIV.2106.05776}, OPTurl = {https://arxiv.org/abs/2106.05776}, author = {Winczewski, Marek and Mandarino, Antonio and Horodecki, Michał and Alicki, Robert}, keywords = {Quantum Physics (quant-ph), FOS: Physical sciences, FOS: Physical sciences}, title = {Bypassing the Intermediate Times Dilemma for Open Quantum System}, publisher = {arXiv}, year = {2021}, copyright = {Creative Commons Attribution 4.0 International} } - Tamoghna Das, Marcin Karczewski, Antonio Mandarino, Marcin Markiewicz, and Marek Żukowski. Optimal interferometry for Bell$-$nonclassicality by a vacuum$-$one$-$photon qubit. , 2021. doi:10.48550/ARXIV.2109.10170
[BibTeX]@article{https://doi.org/10.48550/arxiv.2109.10170, doi = {10.48550/ARXIV.2109.10170}, OPTurl = {https://arxiv.org/abs/2109.10170}, author = {Das, Tamoghna and Karczewski, Marcin and Mandarino, Antonio and Markiewicz, Marcin and Żukowski, Marek}, keywords = {Quantum Physics (quant-ph), FOS: Physical sciences, FOS: Physical sciences}, title = {Optimal interferometry for {Bell}$-$nonclassicality by a vacuum$-$one$-$photon qubit}, publisher = {arXiv}, year = {2021}, copyright = {arXiv.org perpetual, non-exclusive license} }