Regensburg 2025 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 42: Stochastic Thermodynamics
DY 42.7: Talk
Friday, March 21, 2025, 11:00–11:15, H43
Coherent effects in the semiclassical limit of quantum work — •Nicolás Torres-Domínguez1, Carlos Viviescas2, and JD Urbina3 — 1Chalmers tekniska högskola, Göteborg, Sweden — 2Universidad Nacional de Colombia, Bogotá, Colombia — 3Universität Regensburg, Institut für Theoretische Physik
Within the framework of quantum thermodynamics, the use of quasiprobabilities can provide a comprehensive approach to the work statistics of quantum systems. In this formulation the effects of coherences in the initial state of the system are accounted in a natural way for all protocols and are expected to be displayed in the quantum features of the chosen quasidistribution [1]; yet clear examples of this are scarce in the literature. In this work we consider the semiclassical limit of the quantum work distribution obtained using the Kirkwood-Dirac quasiprobability, highlighting the effects of initial coherences on the energetics of the system and on the quantum behavior of the quasidistribution. We illustrate our results in a study of the work distribution of a forced quantum harmonic oscillator [2] in the Weyl-Wigner representation in phase space.
[1] M. Lostaglio, A. Belenchia, A. Levy, S. Hernández-Gómez, N. Fabbri, and S. Gherardini, Quantum 7, 1128 (2023). [2] P. Talkner, P. S. Burada, and P. Hänggi, Phys. Rev. E 78, 011115 (2008).
Keywords: quantum thermodynamics; quasiprobabilty; work; coherence; semiclassical