Please use this identifier to cite or link to this item:
Title: Quantum machine using cold atoms
Authors: Ponomarev, A.V.
Denisov, S.
Hänggi, P. 
Keywords: Atoms in optical lattices
Electric motors
Transport processes
Issue Date: Nov-2010
Citation: Ponomarev, A.V., Denisov, S., Hänggi, P. (2010-11). Quantum machine using cold atoms. Journal of Computational and Theoretical Nanoscience 7 (11) : 2441-2447. ScholarBank@NUS Repository.
Abstract: For a machine to be useful in practice, it preferably has to meet two requirements: namely, (i) to be able to perform work under a load and (ii) its operational regime should ideally not depend on the time at which the machine is switched-on. We devise a minimal setup, consisting of two atoms only, for an ac-driven quantum motor which fulfills both these conditions. Explicitly, the motor consists of two different interacting atoms placed into a ring-shaped periodic optical potential - an optical "bracelet," - resulting from the interference of two counter-propagating Laguerre-Gauss laser beams. This bracelet is additionally threaded by a pulsating magnetic flux. While the first atom plays a role of a quantum "carrier," the second serves as a quantum "starter," which sets off the "carrier" into a steady rotational motion. For fixed zero-momentum initial conditions the asymptotic carrier velocity saturates to a unique, nonzero value which becomes increasingly independent on the starting time with increasing "bracelet"-size. We identify the quantum mechanisms of rectification and demonstrate that our quantum motor is able to perform useful work. Copyright © 2010 American Scientific Publishers.
Source Title: Journal of Computational and Theoretical Nanoscience
ISSN: 15461955
DOI: 10.1166/jctn.2010.1631
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.