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Europhys. Lett., 76 (1), pp. 42-48 (2006)
DOI: 10.1209/epl/i2006-10237-y

Heat conductivity in the presence of a quantized degree of freedom

Jun-Wen Mao1, 2 and You-Quan Li1

1  Zhejiang Institute of Modern Physics, Zhejiang University - Zhejiang 310027, PRC
2  Department of Physics, Huzhou Teachers College - Zhejiang 313000, PRC

jwmao@zimp.zju.edu.cn

received 3 March 2006; accepted in final form 10 August 2006
published online 30 August 2006

Abstract
We propose a model with a quantized degree of freedom to study the heat transport in quasi-one-dimensional systems. 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 Poincaré section also shows remarkably characteristic patterns, completely different from the cases of point-like particles.

PACS
44.10.+i - Heat conduction.
05.45.-a - Nonlinear dynamics and chaos.
05.70.Ln - Nonequilibrium and irreversible thermodynamics.

© EDP Sciences 2006


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