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DY: Fachverband Dynamik und Statistische Physik

DY 24: Poster I

DY 24.4: Poster

Wednesday, March 28, 2007, 16:00–18:00, Poster D

Quantum heat transport in harmonic chains — •Christopher Gaul and Helmut Büttner — Universität Bayreuth, Deutschland

We investigate the mechanism of heat conduction in harmonic 1D models --- including disorder --- with the quantum mechanical Langevin ansatz.

In our quantum mechanical calculations we recover some classical results: The temperature gradient vanishes and heat flux is independent of the length of the chain. In the case of disordered chains normal heat conduction is partially recovered: There is a finite temperature gradient, but the overall heat resistance does not increase linearly with the length of the chain.

Furthermore we observe characteristic quantum mechanical features like freezing of the heat conductivity, entanglement and Bose statistics of the occupation numbers.