Self-diffusion in sheared colloidal suspensions: violation of fluctuation-dissipation relation

Details Self-diffusion in sheared colloidal suspensions: violation of fluctuation-dissipation relation Self-diffusion in sheared colloidal suspensions: violation of fluctuation-dissipation relation

2004-04-28

arxiv.org/abs/cond-mat/0404689v1

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

10.1103/PhysRevLett.93.178301

Using memory-function formalism we show that in sheared colloidal suspensions the fluctuation-dissipation theorem for self-diffusion, i.e. Einstein's relation between self-diffusion and mobility tensors, is violated and propose a new way to measure this violation in Brownian Dynamics simulations. We derive mode-coupling expressions for the tagged particle friction tensor and for an effective, shear-rate dependent temperature.

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