Freiburg 2024 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 33: Open Quantum Systems

Q 33.5: Vortrag

Mittwoch, 13. März 2024, 15:30–15:45, HS 1199

Thermodynamic role of general environments: from heat bath to work reservoir — •Alessandra Colla and Heinz-Peter Breuer — Institute of Physics, University of Freiburg, Hermann- Herder-Straße 3, D-79104 Freiburg, Germany

Environments in quantum thermodynamics usually take the role of heat baths. These baths are Markovian, weakly coupled to the system, and initialized in a thermal state. Whenever one of these properties is missing, standard quantum thermodynamics is no longer suitable to treat the thermodynamic properties of the system that result from the interaction with the environment. Using a recently proposed framework for open system quantum thermodynamics at arbitrary coupling regimes [1], we show that within the very same model (a Fano-Anderson Hamiltonian) the environment can take three different thermodynamic roles: a standard heat bath, exchanging only heat with the system, a work reservoir, exchanging only work, and a hybrid environment, providing both types of energy exchange. The exact role of the environment is determined by the strength and structure of the coupling, and by its initial state.

[1] A. Colla, H.-P. Breuer, Physical Review A 105, 052216 (2022)

Keywords: open quantum systems; quantum thermodynamics; non-markovian evolution