Berlin 2024 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 92: Quantum Dynamics, Decoherence and Quantum Information (joint session DY/TT)

TT 92.6: Vortrag

Freitag, 22. März 2024, 12:00–12:15, A 151

Quantum thermodynamics of impurity models using the principle of minimal dissipation — •Salvatore Gatto, Alessandra Colla, Heinz-Peter Breuer, and Michael Thoss — University of Freiburg

Quantum thermodynamics has witnessed significant attention and advancement in recent years. A central challenge in this field revolves around establishing a consistent and universally accepted definition for work, heat, and entropy production in open quantum systems subjected to thermal reservoirs. Despite numerous proposals, the absence of generally accepted definitions, particularly in scenarios involving strong interactions between the system and reservoirs, remains a contentious issue. A recently developed approach, known as principle of minimal dissipation [1], leads to a unique decomposition of the quantum master equation into coherent and dissipative dynamics, allowing to identify uniquely the contributions describing work and heat.

In this contribution, we apply this approach to investigate the thermodynamic characteristics of impurity models, with a particular focus on memory effects and strong system-bath couplings. The study uses the hierarchical equations of motion approach, which allows a numerically exact simulation of nonequilibrium transport in general open quantum systems involving multiple bosonic and fermionic environments [2].

[1] A. Colla and H. Breuer, Phys. Rev. A 105, 052216 (2022)

[2] J. Bätge, Y. Ke, C. Kaspar, and M. Thoss, Phys. Rev. B 103, 235413 (2021)

Keywords: Quantum thermodynamics; Principle of minimal dissipation