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  • Title: Development of a semiclassical method to compute mobility and diffusion coefficient of a Brownian particle in a nonequilibrium environment.
    Author: Shit A, Ghosh P, Chattopadhyay S, Chaudhuri JR.
    Journal: Phys Rev E Stat Nonlin Soft Matter Phys; 2011 Mar; 83(3 Pt 1):031125. PubMed ID: 21517472.
    Abstract:
    We explore the issue of a quantum-noise-induced directed transport of an overdamped Brownian particle that is allowed to move in a spatially periodic potential. The established system-reservoir model has been employed here to study the quantum-noise-induced transport of a Brownian particle in a periodic potential, where the reservoir is being modulated externally by a Gaussian-colored noise. The mobility of the Brownian particle in the linear response regime has been calculated. Then, using Einstein's relation, the analytical expression for the diffusion rate is evaluated for any arbitrary periodic potential for the high-temperature quantum regime.
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