Classical limits and contextuality in a scenario with multiple observers

Zapraszamy w środę  04.03.2020 o godz. 10:15, sala 361 na seminarium.

Seminarium pod tytułem: "Classical limits and contextuality in a scenario with multiple observers" poprowadzi Roberto Baldijão, University of Campinas, IQOQI (Vienna)

Abstract:

Contextuality is regarded as a non-classical feature, challenging our everyday intuition; quantum contextuality is currently seen as a resource for many applications in quantum computation, being responsible for quantum advantage over classical analogs. In our work, we adapt the N-cycle scenarios with odd N to multiple independent observers which measure the system sequentially. We analyze the possibility of violating the inequalities as a function of the number of observers and under different measurement protocols. We then reinterpret the results as an open quantum system where the environment is divided into fractions. In this context, the results show the emergence of non-contextuality in such a setting, bringing together the quantum behavior to our classical experience. We then compare such emergence of non-contextuality with that of objectivity under the Quantum Darwinism process. We also take the opportunity to present recent developments in classical limits in Generalized Probabilistic Theories.