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Fractional resonances in the atom-optical delta-kicked accelerator.

Saunders, M. and Halkyard, P. L. and Gardiner, S. A. and Challis, K. J. (2009) 'Fractional resonances in the atom-optical delta-kicked accelerator.', Physical review A., 79 (2). 023423 .


We consider resonant dynamics in a dilute atomic gas falling under gravity through a periodically pulsed standing-wave laser field. Our numerical calculations are based on a Monte Carlo method for an incoherent mixture of noninteracting plane waves, and we show that quantum resonances are highly sensitive to the relative acceleration between the atomic gas and the pulsed optical standing wave. For particular values of the atomic acceleration, we observe fractional resonances. We investigate the effect of the initial atomic momentum width on the fractional resonances and quantify the sensitivity of fractional resonances to thermal effects.

Item Type:Article
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Publisher statement:© 2009 by The American Physical Society. All rights reserved.
Date accepted:No date available
Date deposited:13 July 2010
Date of first online publication:February 2009
Date first made open access:No date available

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