Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2004-06-29
Phys. Rev. Lett. 93, 230601 (2004)
Physics
Condensed Matter
Statistical Mechanics
4 pages, 1 figure, final version
Scientific paper
10.1103/PhysRevLett.93.230601
We study a class of nonequilibrium lattice models which describe local redistributions of a globally conserved energy. A particular subclass can be solved analytically, allowing to define a temperature T_{th} along the same lines as in the equilibrium microcanonical ensemble. The fluctuation-dissipation relation is explicitely found to be linear, but its slope differs from the inverse temperature T_{th}^{-1}. A numerical renormalization group procedure suggests that, at a coarse-grained level, all models behave similarly, leading to a two-parameter description of their macroscopic properties.
Bertin Eric
Dauchot Olivier
Droz Michel
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