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arXiv · 0711.0374

Directed motion generated by heat bath nonlinearly driven by external noise

Jyotipratim Ray Chaudhuri·Debashis Barik·Suman Kumar Banik
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Abstract

Based on the system heat bath approach where the bath is nonlinearly modulated by an external Gaussian random force, we propose a new microscopic model to study directed motion in the overdamped limit for a nonequilibrium open system. Making use of the coupling between the heat bath and the external modulation as a small perturbation we construct a Langevin equation with multiplicative noise and space dependent dissipation and the corresponding Fokker-Planck-Smoluchowski equation in the overdamped limit. We examine the thermodynamic consistency condition and explore the possibility of observing a phase induced current as a consequence of state dependent diffusion and, necessarily, nonlinear driving of the heat bath by the external noise.

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Jyotipratim Ray Chaudhuri, Debashis Barik, Suman Kumar Banik. 2007-11-02. Directed motion generated by heat bath nonlinearly driven by external noise. https://doi.org/10.1088/1751-8113/40/49/007

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