Dresden 2026 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 27: Statistical Physics far from Thermal Equilibrium II
DY 27.3: Vortrag
Dienstag, 10. März 2026, 14:30–14:45, ZEU/0114
Mpemba effect for a particle in a bistable potential: classical versus quantum — •Jannis Michael Melles1, Hartmut Löwen1, Benno Liebchen2, and Alexander Antonov1 — 1Institut für Theoretische Physik II: Weiche Materie, Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany — 2Institut für Physik der kondensierten Materie, Technische Universität Darmstadt, Darmstadt, Germany
An anomalous cooling behavior where initially hot systems cool faster than initially warm ones is referred to as the Mpemba effect and clearly goes beyond quasi-static thermodynamics. For classical particles, such a cooling behavior has been thoroughly studied for a simple paradigmatic set up involving a single classical colloidal particle in a bistable optical potential [1]. We quantize this model and consider a quantum particle coupled to an external bath with the Lindblad damping [2]. The Mpemba effect does occur during the cooling of this quantum system; however, the origin of the anomalous cooling is qualitatively massively different from that of its classical counterpart for temperatures close to or at zero. Additionally, we identify a doubled inverse quantum Mpemba effect when the system is heated instead. Our results are amenable for an experimental verification with an ultracold atom in a suitable laser-optical trap potential.
[1] A. Kumar and J. Bechhoefer, Nature 584, 64 (2020)
[2] J. Melles, H. Löwen, B. Liebchen and A. Antonov, to be published
Keywords: Quantum Mpemba effect