Erlangen 2022 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 10: Quantum Information (Concepts and Methods) II

Q 10.1: Vortrag

Montag, 14. März 2022, 16:30–16:45, Q-H12

Initial state dependence in the dynamics of open systems — •Sebastian Wenderoth and Michael Thoss — Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany

Intuitively, an open system coupled to an environment relaxes to a well-defined and unique equilibrium state, which is determined by macroscopic properties of the environment like the temperature or the chemical potential only. In the long-time limit, the state of the open system is thus expected to be independent of its initial state.

In this contribution we present a concept which allows us to characterize the influence of the initial state on the dynamics of an open system. Our approach is based on the reduced system propagator, the latter being a linear map on the open system's state space. Using properties of the reduced system propagator we quantify the influence of the initial state on expectation values of observables of the open system. Additionally, we provide necessary and sufficient conditions under which the long-time dynamics of an open system is independent of its initial state. We demonstrate our concepts for different long-time behaviors of the spin-boson model.