Transient rectification of Brownian diffusion with asymmetric initial distribution

Details Transient rectification of Brownian diffusion with asymmetric initial distribution Transient rectification of Brownian diffusion with asymmetric initial distribution

2007-05-23

arxiv.org/abs/0705.3463v2

Phys. Rev. E 76, 031121 (2007)

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

10.1103/PhysRevE.76.031121

In an ensemble of non-interacting Brownian particles, a finite systematic average velocity may temporarily develop, even if it is zero initially. The effect originates from a small nonlinear correction to the dissipative force, causing the equation for the first moment of velocity to couple to moments of higher order. The effect may be relevant when a complex system dissociates in a viscous medium with conservation of momentum.

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