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Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
Quantum transport in a periodic symmetric potential of a driven quantum system
Satyabrata Bhattacharya1, Pinaki Chaudhury, Sudip Chattopadhyay
1Department of Chemistry, Bengal Engineering and Science University, Shibpur, Howrah 711103, India.
Abstract:
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.
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