Monday, November 12, 2012

1211.2181 (C. Maes et al.)

Fluctuation-response relations for nonequilibrium diffusions with memory    [PDF]

C. Maes, S. Safaverdi, P. Visco, F. van Wijland
Strong interaction with other particles or feedback from the medium on a Brownian particle entail memory effects in the effective dynamics. We discuss the extension of the fluctuation-dissipation theorem to nonequilibrium Langevin systems with memory. An important application is to the extension of the Sutherland-Einstein relation between diffusion and mobility. Nonequilibrium corrections include the time-correlation between the dynamical activity and the velocity of the particle, which in turn leads to information about the correlations between the driving force and the particle's displacement.
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