Energy transport in anharmonic lattices close and far from equilibrium

Details Energy transport in anharmonic lattices close and far from equilibrium Energy transport in anharmonic lattices close and far from equilibrium

1997-09-15

arxiv.org/abs/cond-mat/9709156v1

Physica D119 (1998) 140

Physics

Condensed Matter

Statistical Mechanics

10 pages, 4 figures, to be published in Physica D

Scientific paper

10.1016/S0167-2789(98)00076-1

The problem of stationary heat transport in the Fermi-Pasta-Ulam chain is numerically studied showing that the conductivity diverges in the thermodynamic limit. Simulations were performed with time-reversible thermostats, both for small and large temperature gradients. In the latter case, fluctuations of the heat current are shown to be in agreement with the recent conjectures of Gallavotti and Cohen.

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