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QI: Fachverband Quanteninformation
QI 35: Quantum Information: Concepts and Methods II
QI 35.8: Vortrag
Donnerstag, 13. März 2025, 16:15–16:30, HS IV
Entropic witness for quantum memory — •Charlotte Bäcker1, Konstantin Beyer2, and Walter Strunz1 — 1TUD Dresden University of Technology, 01062, Dresden, Germany — 2Stevens Institute of Technology, Hoboken, New Jersey, 07030, USA
In quantum physics, non-Markovian processes arise from the interaction between the quantum system and its environment whenever memory effects play a role. The question of whether the memory provided by the environment can be considered classical or requires a quantum description is part of an ongoing debate. We present a witness for quantum memory based on entropy, which can be computed for any dimension of the quantum system of interest. This approach will be illustrated by an application of the witness to qudit dynamics as well as to continuous-variable Gaussian dynamics.
Keywords: quantum memory; non-Markovianity; open quantum systems; Gaussian dynamics; entropy