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DY: Fachverband Dynamik und Statistische Physik

DY 12: Quantum Dynamics, Decoherence, and Quantum Information II

DY 12.1: Talk

Tuesday, March 15, 2011, 10:15–10:30, ZEU 255

Hamiltonian of mean force for a damped quantum oscillator — •Stefanie Hilt, Benedikt Thomas, and Eric Lutz — Department of Physics, University of Augsburg, 86135 Augsburg, Germany

We consider a quantum harmonic oscillator linearly coupled to a reservoir of harmonic oscillators. For a finite coupling strength the stationary distribution of the damped oscillator is not of the Gibbs form, in contrast to standard thermodynamics. We quantify this deviation by evaluating the quantum Hamiltonian of mean force exactly and discuss its connection with the initial coupling process between system and reservoir.