Bonn 2025 – scientific programme

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AKjDPG: Arbeitskreis junge DPG

AKjDPG 1: Open Quantum Systems

AKjDPG 1.2: Tutorial

Sunday, March 9, 2025, 14:50–15:40, HS 3+4

Non-Markovian Quantum Dynamics: Physical Concepts and Mathematical Methods Describing Memory in Open Systems — •Heinz-Peter Breuer — Physikalisches Institut, Universität Freiburg, Hermann-Herder- Straße 3, D-79104 Freiburg, Germany — EUCOR Centre for Quantum Science and Quantum Computing, University of Freiburg, Hermann-Herder-Straße 3, D-79104 Freiburg, Germany

The dynamics of open quantum systems is often approximated by means of a Markovian process in which the open system irretrievably loses information to its surroundings, expressing the memoryless nature of the dynamics. However, open systems out of equilibrium often exhibit a pronounced non-Markovian behavior distinguished by a flow of information from the environment back to the open system. This information backflow leads to the emergence of memory effects and represents the key feature of non-Markovian quantum dynamics. In the talk I will discuss fundamental physical concepts and mathematical methods used to characterize, to quantify and to model quantum memory effects in open systems.

Keywords: non-Markovian quantum dynamics; open quantum systems; information flow; quantum master equations