The modified Sutherland--Einstein relation for diffusive nonequilibria

Details The modified Sutherland--Einstein relation for diffusive nonequilibria The modified Sutherland--Einstein relation for diffusive nonequilibria

2011-01-17

arxiv.org/abs/1101.3227v2

Proc. R. Soc. A, vol. 467, 2792-2809 (2011)

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

10.1098/rspa.2011.0046

There remains a useful relation between diffusion and mobility for a Langevin particle in a periodic medium subject to nonconservative forces. The usual fluctuation-dissipation relation easily gets modified and the mobility matrix is no longer proportional to the diffusion matrix, with a correction term depending explicitly on the (nonequilibrium) forces. We discuss this correction by considering various simple examples and we visualize the various dependencies on the applied forcing and on the time by means of simulations. For example, in all cases the diffusion depends on the external forcing more strongly than does the mobility. We also give an explicit decomposition of the symmetrized mobility matrix as the difference between two positive matrices, one involving the diffusion matrix, the other force--force correlations.

Affiliated with

Also associated with

No associations

Rating

The modified Sutherland--Einstein relation for diffusive nonequilibria does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The modified Sutherland--Einstein relation for diffusive nonequilibria, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The modified Sutherland--Einstein relation for diffusive nonequilibria will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-286359