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Heat conduction in one dimensional nonintegrable systems

Bambi Hu, Baowen Li, Hong Zhao

cond-matarXiv:cond-mat/0002192

Abstract

Two classes of 1D nonintegrable systems represented by the Fermi-Pasta-Ulam (FPU) model and the discrete ϕ4 model are studied to seek a generic mechanism of energy transport in microscopic level sustaining macroscopic behaviors. The results enable us to understand why the class represented by the ϕ4 model has a normal thermal conductivity and the class represented by the FPU model does not even though the temperature gradient can be established.

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