Regensburg 2007 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 24: Poster I

DY 24.8: Poster

Mittwoch, 28. März 2007, 16:00–18:00, Poster D

Decoherence, entanglement and entropy in non-Markovian quantum Brownian motion — •Christian Hörhammer and Helmut Büttner — Theoretische Physik I, Universität Bayreuth, 95440 Bayreuth

Decoherence is associated with the formation of quantum correlations of an open quantum system with the environment. The fact that the Brownian particle and its environment become entangled may lead to deviations between the thermodynamic entropy of a quantum Brownian oscillator derived from the partition function of the subsystem and the von Neumann entropy of its reduced density matrix. We give an explanation for these findings and point out that these deviations become important in cases where statements about the information capacity of the subsystem are connected to thermodynamic properties.