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Phys. Rev. Lett. 100, 044104 (2008) [4 pages]

Controlling the Ratchet Effect for Cold Atoms

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Anatole Kenfack1, Jiangbin Gong2, and Arjendu K. Pattanayak3
1Max-Planck-Institut für Physik Komplexer Systeme, Nöthnitzer Strasse 38, D-01187 Dresden, Germany
2Department of Physics and Center for Computational Science and Engineering, National University of Singapore, 117542, Republic of Singapore
3Department of Physics and Astronomy, Carleton College, Northfield, Minnesota 55057, USA

Received 5 September 2007; published 31 January 2008

Low-order quantum resonances manifested by directed currents have been realized with cold atoms. Here we show that by increasing the strength of an experimentally achievable delta-kicking ratchet potential, quantum resonances of a very high order may naturally emerge and can induce larger ratchet currents than low-order resonances, with the underlying classical limit being fully chaotic. The results offer a means of controlling quantum transport of cold atoms.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.044104
DOI:
10.1103/PhysRevLett.100.044104
PACS:
05.45.−a, 05.60.Gg, 37.10.Jk
 
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