Dresden 2014 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 6: Statistical Physics far from Thermal Equilibrium - Part II
DY 6.4: Vortrag
Montag, 31. März 2014, 16:00–16:15, ZEU 160
Thermodynamics of Quantum-Jump-Conditioned Feedback Control — •Philipp Strasberg1, Gernot Schaller1, Tobias Brandes1, and Massimiliano Esposito2 — 1Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstr. 36, D-10623 Berlin, Germany — 2Complex Systems and Statistical Mechanics, University of Luxembourg, L-1511 Luxembourg, Luxembourg
We consider open quantum systems weakly coupled to thermal reservoirs and subjected to quantum feedback operations triggered with or without delay by monitored quantum jumps. We establish a thermodynamic description of such systems and analyze how the first and second law of thermodynamics are modified by the feedback. We apply our formalism to study the efficiency of a qubit subjected to a quantum feedback control and operating as a heat pump between two reservoirs. We also demonstrate that quantum feedbacks can be used to stabilize coherences in nonequilibrium stationary states which in some cases may even become pure quantum states.
Ref.: arXiv:1305.6589 (accepted by Phys. Rev. E)