Gaussian noise and time-reversal symmetry in non-equilibrium Langevin models

Details Gaussian noise and time-reversal symmetry in non-equilibrium Langevin models Gaussian noise and time-reversal symmetry in non-equilibrium Langevin models

2007-02-15

arxiv.org/abs/cond-mat/0702358v1

Phys. Rev. E 75, 031106 (2007)

Physics

Condensed Matter

Statistical Mechanics

6 pages, submitted to PRE

Scientific paper

10.1103/PhysRevE.75.031106

We show that in driven systems the Gaussian nature of the fluctuating force and time-reversibility are equivalent properties. This result together with the potential condition of the external force drastically restricts the form of the probability distribution function, which can be shown to satisfy time-independent relations. We have corroborated this feature by explicitly analyzing a model for the stretching of a polymer and a model for a suspension of non-interacting Brownian particles in steady flow.

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