Heat conductivity in the presence of a quantized degree of freedom

Details Heat conductivity in the presence of a quantized degree of freedom Heat conductivity in the presence of a quantized degree of freedom

2006-09-28

arxiv.org/abs/cond-mat/0609733v1

Europhys. Lett. 76, 42-48 (2006)

Physics

Condensed Matter

Disordered Systems and Neural Networks

7 pages, 4 figures

Scientific paper

10.1209/epl/i2006-10237-y

We propose a model with a quantized degree of freedom to study the heat transport in quasi-one dimensional system. Our simulations reveal three distinct temperature regimes. In particular, the intermediate regime is characterized by heat conductivity with a temperature exponent $\gamma$ much greater than 1/2 that was generally found in systems with point-like particles. A dynamical investigation indicates the occurrence of non-equipartition behavior in this regime. Moreover, the corresponding Poincar\'e section also shows remarkably characteristic patterns, completely different from the cases of point-like particles.

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