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Directed motion in a periodic potential of a quantum system coupled to a heat bath driven by a colored noise
S BHATTACHARYA, S CHATTOPADHYAY, J R CHAUDHURI,
Published in AMER PHYSICAL SOC
2008
Volume: 78
   
Issue: 2
Abstract
A system-reservoir nonlinear coupling model is proposed for a quantum system when the associated bath is not in thermal equilibrium but is modulated by an external colored noise, to present a microscopic approach to quantum state-dependent diffusion and multiplicative noise in terms of a quantum Langevin description. Consequently, the Fokker-Planck equation in position space, valid in the overdamped limit, for multiplicative colored noise is constructed to explore the possibility of observing a quantum current and dependence of the current on various parameters of external noise is examined. © 2008 The American Physical Society.
About the journal
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
PublisherAMER PHYSICAL SOC
ISSN1539-3755