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TT: Fachverband Tiefe Temperaturen

TT 18: Focus Session: Relaxation Timescales in Open Quantum Systems (joint session TT/DY)

TT 18.1: Topical Talk

Montag, 9. März 2026, 15:00–15:30, CHE/0089

Markovian and non-Markovian approaches to quantum relaxation — •Heinz-Peter Breuer — Institute of Physics, University of Freiburg, Hermann-Herder-Straße 3, D-79104 Freiburg, Germany

Relaxation and decoherence processes in open quantum systems are often approximated by means of a Markovian evolution in which the open system irretrievably loses information to its surroundings, expressing the memoryless nature of the dynamics. However, strongly coupled open systems often exhibit a pronounced non-Markovian behavior distinguished by a flow of information from the environment back to the open system. This information backflow implies the presence of memory effects and represents the key feature of non-Markovian quantum dynamics. In the talk we will discuss fundamental physical concepts used to characterize and quantify non-Markovian relaxation dynamics in open systems, and present some applications to irreversibility and entropy production in nonequilibrium quantum thermodynamics.

Keywords: non-Markovian dynamics; open quantum systems; quantum thermodynamics