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Heimsoth, M. and Creffield, Charles E. and Sols Lucía, Fernando (2010) Weakly driven quantum coherent ratchets in cold-atom systems. Physical review A, 82 (2). ISSN 1050-2947
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Official URL: http://dx.doi.org/10.1103/PhysRevA.82.023607
Abstract
We present an analytical study of the response of cold atoms in an optical lattice to a weak time- and space-asymmetric periodic driving signal. In the noninteracting limit, and for a finite set of resonant frequencies, we show how a coherent, long-lasting ratchet current results from the interference between first- and second-order processes. In those cases, a suitable three- level model can account for the entire dynamics, yielding surprisingly good agreement with numerically exact results for weak and moderately strong driving.
Item Type: | Article |
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Additional Information: | ©2010 The American Physical Society. |
Uncontrolled Keywords: | Brownian motors; Transport |
Subjects: | Sciences > Physics > Materials Sciences > Physics > Solid state physics |
ID Code: | 32950 |
Deposited On: | 28 Aug 2015 11:02 |
Last Modified: | 21 Jun 2022 17:21 |
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