Classical description of bosonic quantum fields in terms of the reduced-state-of-the-field framework

Speaker: Tomasz Linowski (ICTQT, UG) Abstract We discuss compatibility between various quantum aspects of bosonic fields, relevant for quantum optics and quantum thermodynamics, and the mesoscopic formalism of reduced state of the field (RSF). In particular, we derive exact conditions under which Gaussian and Bogoliubov-type evolutions can be cast into the RSF framework. To strengthen the […]

Speaker: Paramasivan Arumugam (IIT Roorkee) Abstract From the core of the matter to the stellar objects, the underlying physics relies significantly on how we understand atomic nuclei. On the other hand, the ever-puzzling nuclear interaction can be studied at various energy scales ranging from thermal neutrons to relativistic heavy-ion collisions and various sizes up to those […]

Speaker: Marek Eggen (University of Gdansk) Abstract In my presentation about my PhD work I will talk about Single Ion Magnets and their possible applications as the new contrast agents used in MRI. In order to obtain the magnetic properties of the selected Single Ion Magnets I have used ab-initio methods which are going to be […]

Speaker: Ana Belen Sainz (ICTQT, University of Gdansk) Abstract This talk is a brief summary of my Habilitation thesis, tailored at the members of the Rada Dyscypliny, and hopefully interesting for other quantum scientists as well. I will walk you through 12 of my main publications from the last six years, touching on almost-quantum correlations, causal […]

Speaker: Karolina Lademann (University of Gdansk) Abstract In this presentation I will focus on some numerical approaches to certain types of linear Klein Gordon equations. More particularly, I will present the numerical approach based on the Duhamel formula, where we obtain second order approximation. Modulated Fourier expansion based method will be presented as the one useful […]

Speaker: Marcin Markiewicz (ICTQT, University of Gdansk) Abstract ``The unambiguous account of proper quantum phenomena must, in principle, include a description of all relevant features of experimental arrangement" (Bohr). The measurement process is composed of pre-measurement (quantum correlation of the system with the pointer variable), and an irreversible decoherence via interaction with an environment. The system […]

Speaker: Karol Horodecki (ICTQT, University of Gdansk) Abstract Quantum key distribution (QKD) is a method that distributes a secret key to a sender and receiver by the transmission of quantum particles (e.g. photons). Device-independent quantum key distribution (DIQKD) is a version of QKD with a stronger notion of security, in that the sender and receiver base […]

Speaker: Andy Chia (NUS Singapore) Abstract Abstract: The amplification of light in quantum theory has a long history, with research devoted mostly to the linear (i.e. one-photon) regime due to its simplicity [1]. However, nonlinear amplification has also received some interest since the 1960s. One obvious generalisation of linear/one-photon amplification is to allow for two […]

Speaker: Hippolyte Lazourenko-Dourdent  (Institut Néel / Université Grenoble Alpes) Abstract While the standard formulation of quantum theory relies on a fixed background causal structure, one can consider a more general framework - based on quantum theory - where the causal structure is indefinite (the "process matrix formalism"). Interestingly, the tools introduced to identify causal indefiniteness - causal […]

Speaker: Maharshi Ray (Centre for Quantum Technologies, National University of Singapore) Abstract We discuss schemes to certify local quantum systems via self-testing and dimension witnessing. This work leverages the graph-theoretic framework for contextuality introduced by Cabello, Severini, and Winter, combined with tools from combinatorial optimisation that guarantee the unicity of optimal solutions. We first show […]