Freiburg 2024 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 33: Open Quantum Systems
Q 33.3: Vortrag
Mittwoch, 13. März 2024, 15:00–15:15, HS 1199
Dynamically Emergent Quantum Thermodynamics: The Non-Markovian Otto Cycle — •Irene Ada Picatoste1, Alessandra Colla1, and Heinz-Peter Breuer1,2 — 1Physikalisches Institut, Universität Freiburg, Hermann-Herder-Straße 3, D-79104 Freiburg, Germany — 2EUCOR Centre for Quantum Science and Quantum Computing, University of Freiburg, Hermann-Herder-Straße 3, D-79104 Freiburg, Germany
Using an open-system approach to quantum thermodynamics at arbitrary coupling [1] we study the Otto cycle in the strong-coupling and non-Markovian regimes [2]. Our investigation is based on the exact treatment of the dynamics of the system when coupled to a thermal reservoir, which we describe employing the Fano-Anderson model. We study the effects of strong coupling and a structured environment, and find that a non-Markovian bath can exchange both heat and work with the system. We identify a regime of enhanced efficiency occurring when the peak of the spectral density is located within the frequency range of the cycle, and explain this through an analysis of the renormalized frequencies emerging from the system-bath interaction.
[1] A. Colla and H.-P. Breuer, Open-system approach to nonequilibrium quantum thermodynamics at arbitrary coupling, May 2022, 10.1103/PhysRevA.105.052216.
[2] I. A. Picatoste, A. Colla and H.-P. Breuer, Dynamically Emergent Quantum Thermodynamics: Non-Markovian Otto Cycle, Aug 2022, axXiv: 2308.09462 [quant-ph].
Keywords: open quantum systems; quantum thermodynamics; non-markovian evolution; quantum heat engine