Quantum transport in a periodic symmetric potential of a driven quantum system.
A system-reservoir nonlinear coupling model has been proposed to the situation when the system is driven externally by a random force and the associated bath is kept in thermal equilibrium, in an attempt to put forth a microscopic approach to quantum state-dependent diffusion and multiplicative noises in terms of a quantum Langevin equation in the overdamped limit (quantum Smoluchowski equation). We then obtain the analytical expression for phase induced quantum current in a periodic potential when the external noise has finite correlation time and explore the dependence of the current on various parameters related to the external noise, for example, the noise strength.
Bhattacharya
Satyabrata
S
Department of Chemistry, Bengal Engineering and Science University, Shibpur, Howrah 711103, India.
Chaudhury
Pinaki
P
Chattopadhyay
Sudip
S
Chaudhuri
Jyotipratim Ray
JR