Regensburg 2016 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 17: Statistical Physics far from Thermal Equilibrium
DY 17.10: Vortrag
Dienstag, 8. März 2016, 12:30–12:45, H48
Nonequilibrium thermodynamics of open degenerate quantum systems — Gregory Bulnes Cuetara1, Massimiliano Esposito2, and •Gernot Schaller3 — 1Dept. of Chemistry & Biochemistry, UCSD, Urey Hall, 9500 Gilman Dr., La Jolla, CA 92093-0340, USA — 2University of Luxembourg, Physics and Materials Science Research Unit, Campus Limpertsberg BRB 0.03, 162a avenue de la Faïencerie, L-1511 Luxembourg, G. D. Luxembourg — 3Institut für Theoretische Physik, Technische Universität Berlin, Eugene-P.-Wigner-Gebäude PN 147, Hardenbergstr. 36, 10623 Berlin
We establish quantum stochastic thermodynamics for open systems with degenerate energy eigenstates. The Born-Markov-secular quantum master equation (QME) leads in this case to couplings between degenerate populations and their coherences. We show that our genuine quantum formulation nevertheless reduces to conventional stochastic thermodynamics with time-dependent rates satisfying local detailed balance, when the QME is represented in the time dependent basis diagonalizing the system density matrix. We illustrate our findings by considering transport through a parallel double quantum dot junction with degenerate levels, where the coupling to two different environments may drag the system towards a pure state.