Quantum reference frames: towards a quantum description of space and time

Speaker: Flaminia Giacomini Abstract In physics, observations are typically made with respect to a frame of reference. Although reference frames are usually not considered as degrees of freedom, in practical situations it is a physical system that constitutes a reference frame. Can a quantum system be considered as a reference frame and, if so, which […]

Speaker: Piotr Kopszak Abstract Port-based teleportation (PBT) is a quantum teleportation protocol, in which the parties exploit joint measurements performed on $N$ shared $d$-dimensional maximally entangled pairs (the resource) and the state to be teleported, with the addition of the one-way classical communication. The lack of correction in the last step is an essential feature […]

Speaker:  Marcin Markiewicz ( University of Gdańsk ) Abstract Recently there appeared many works on modified Wigner's Friend paradoxes, which suggest that quantum theory cannot consistently describe the scenario with many observers. In this presentation I will show an alternative approach to this problem, which indicates that the paradoxes are in fact apparent, and the […]

Speaker: Jordan Cotler (Harvard University) Abstract We introduce a theoretical framework to study experimental physics using quantum complexity theory. This allows us to address: what is the computational complexity of an experiment? For several 'model' experiments, we prove that there is an exponential savings in resources if the experimentalist can entangle apparatuses with experimental samples. […]

Speaker: Erik Aurell (KTH Royal Institute of Technology, Stockholm) Abstract A well-studied model in open quantum system theory is a system interacting with a thermal bath of harmonic oscillators at finite temperature. This provides a quantum mechanical model of a classical resistive element in a circuit, and includes as famous examples the Caldeira-Leggett theory of […]

Speaker:  H. Chau Nguyen (University of Siegen, Germany)

Speaker: Marcin Łobejko (University of Gdańsk)

Speaker: Filip Maciejewski (CFT PAN Warszawa) Abstract We introduce operational distance measures between quantum states, measurements, and channels based on their average-case distinguishability. To this end, we analyze the average Total Variation Distance (TVD) between statistics of quantum protocols in which quantum objects are intertwined with random circuits and subsequently measured in a computational basis. […]