Kolmogorov consistency as a quantumness witness for external system

Speaker: Fattah Sakuldee, ICTQT Abstract We study the classicality of a finite quantum system, called environment, defined by commutativity of the associate operator algebra, given sequential measurements on the environment. We demonstrate by constructing a scheme of probing from the pure-dephasing-type interaction with a qudit and preparation-evolution-measurement protocol thereon, the weak measurement sequence on the studied […]

Speaker: Stefano Cusumano, NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR (Pisa) Abstract As I will shortly move to ICTQT, in this talk I will try to give an overview of my work during the PhD. During this period I worked mainly on open quantum systems, applying collisional models to study both cascade systems (i.e. systems […]

Speaker: Prof. dr hab. Piotr Kwiek, UG Abstract W roku 1984 Leroy i Blomme opracowali podstawy teoretyczne dyfrakcji dwóch spójnych wiązek światła na fali ultradźwiękowej padających na nią pod dodatnim i ujemnym kątem Bragga. W roku 2019 teoria Leroya i Blommego została potwierdzona eksperymentalnie. Dokonano tego korzystając z interferometru Macha-Zehndera, w którym zwierciadło wyjściowe interferometru […]

Speaker: Máté Farkas Abstract We show that the class MIP* of languages that can be decided by a classical verifier interacting with multiple all-powerful quantum provers sharing entanglement is equal to the class RE of recursively enumerable languages. Our proof builds upon the quantum low-degree test of (Natarajan and Vidick, FOCS 2018) by integrating recent […]

Speaker: Sébastien Designolle, University of Geneva Abstract Symmetries are a key concept to connect mathematical elegance with physical insight. We consider measurement assemblages in quantum mechanics and show how their symmetry can be described by means of the so-called discrete bundles. It turns out that that many measurement assemblages used in quantum information theory as well […]

Speaker: Karol Życzkowski, Jagiellonian University, Cracow, Center for Theoretical Physics, Warsaw, KCIK, Sopot    Abstract A brief introduction to entanglement of multipartite pure quantum states will be given. As the Bell states are known to be maximally entangled among all two-qubit quantum states, a natural question arises: What is the most entangled state for the quantum […]

Speaker: Robert Alicki, International Centre for Theory of Quantum Technologies (ICTQT), UG Abstract Przedstawione będą argumenty sugerujące, że początek ewolucji biologicznej wymagał powstania prymitywnych silników chemicznych wytwarzających pracę w postaci mechanicznych oscylacji. Zasada działania takich silników byłaby podobna do funkcjonowania akumulatorów, baterii, a także ogniw paliwowych, fotowoltaicznych i termoelektrycznych. Zgodnie z rozwijaną przez autora i współpracowników […]

Speaker: Horacio M. Pastawski, Universidad Nacional de Córdoba, Argentina, Abstract In recent years, Solid State Nuclear Magnetic Resonance (NMR) has given us the chance to observe surprising dynamical emergent phenomena [1]. This is possible because this technique addresses spins in the thermodynamic limit. We have addressed two phenomena: A) the polarization a spin dimmer, may have […]

Speaker: Carlo Maria Scandolo Abstract The most general quantum object that can be shared between two distant parties is a bipartite quantum channel. While much effort over the last two decades has been devoted to the study of entanglement of bipartite states, very little is known about the entanglement of bipartite channels. In this work, […]

Speaker: Matteo Lostaglio (ICFO, Barcelona)   Abstract A number of noncontextual models exist which reproduce different subsets of quantum theory and admit a no-cloning theorem. Therefore, if one chooses noncontextuality as one’s notion of classicality, no-cloning cannot be regarded as a nonclassical phenomenon. In this work, however, we show that there are aspects of the phenomenology […]