Regensburg 2016 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 13: Focus Session: Single Particle Sources for Electronic Devices II (Joint session of HL and TT, organized by HL)
HL 13.8: Vortrag
Montag, 7. März 2016, 17:45–18:00, H10
Exact duality for open system time-evolution and surprises in the heat current relaxation of an interacting quantum dot — •Roman Saptsov1,2, Jens Schulenborg3, Federica Haupt4, Janine Splettstoesser3, and Maarten Wegewijs1,2,5 — 1Institute for Theory of Statistical Physics, RWTH Aachen University, Aachen, Germany — 2JARA - FIT — 3Chalmers University of Thechnology, Götenborg, Sweden — 4JARA Institute for Quantum Information, RWTH Aachen, Aachen, Germany — 5Peter Grünberg Institut, FZ-Jülich, Jülich, Germany
Recent progress in nanoelectronics has brought the experimental detection and manipulation of few-electron heat currents in nanodevices within reach.
However, a straightforward theoretical calculation of the heat-current relaxation – already for the simplest model of an Anderson quantum dot – exhibits a surprising behavior. More precisely, the contribution to the heat-current relaxation arising from the decay of the repulsive Coulomb interaction energy exhibits signatures of electron-electron attraction, and is governed by an interaction-independent decay rate [1]. The surprising behavior of the interaction-induced dissipation mode can only be understood with the help of a new duality relating the nonunitary evolution of an open quantum system to that of dual model with inverted energies [1]. Deriving from the fermion-parity superselection postulate, this duality applies to a large class of open systems, allowing for new general insights beyond the quantum-dot heat-current problem presented here.
J.Schulenborg, R. B. Saptsov, F. Haupt, J. Splettstoesser,
M.R. Wegewijs, arXiv: 1508.06145