Berlin 2024 – scientific programme
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QI: Fachverband Quanteninformation
QI 24: Verification and Benchmarking of Quantum Systems
QI 24.5: Talk
Thursday, March 21, 2024, 10:45–11:00, HFT-TA 441
Verification of quantum memory in non-Markovian processes based on local information — •Charlotte Bäcker1, Konstantin Beyer1,2, and Walter Strunz1 — 1TUD Dresden University of Technology, 01062, Dresden, Germany — 2Stevens Institute of Technology, Hoboken, New Jersey, 07030, USA
Non-Markovian processes in quantum physics may be the result of the environmental degrees of freedom acting as a memory. It is an ongoing debate whether the memory effects can be modeled by a classical memory or whether their origin is inherently quantum. We propose a witness based only on local information of the system dynamics, which allows to verify the quantum nature of the memory. Using physically motivated examples, we show that both classical and quantum memory can occur in non-Markovian dynamics and establish the link between classical memory and a physically measurable quantum trajectory representation.
Keywords: open quantum systems; non-Markovianity; quantum memory; quantum trajectories; mathematical physics