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 [Phys. Rev. Lett. 74 (1995) 2694]. (C) 1998 Elsevier Science B.V.
|Number of pages||8|
|Journal||Physica. D, Nonlinear Phenomena|
|Publication status||Published - 1 Aug 1998|
- heat conduction
- Nose-Hoover dynamics
- chaotic hypothesis
- DIMENSIONAL LATTICES