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Bulletin of the American Physical Society

Coherent control of weak light localization in ultracold atomic $^{87}$Rb

R. G. Olave, Havey, V. M. Datsyuk, D.V. Kupriyanov, Igor M. Sokolov

Published May 17, 2006• 0 citations
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Coherent control of weak light localization in ultracold atomic 87^{87}87Rb
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We demonstrate the ability to coherently control ultracold atomic Rb collisions using frequency-chirped light on the nanosecond time scale. For certain center frequencies of the chirp, the rate of inelastic trap-loss collisions induced by negatively chirped light is dramatically suppressed compared to the case of a positive chirp. We attribute this to a fundamental asymmetry in the system: an excited wave packet moves inward on the attractive molecular potential. For a positive chirp, the resonance condition moves outward in time, while for a negative chirp, it moves inward, in the same direction as the excited wave packet; this allows multiple interactions between the wave packet and the light, enabling the wave packet to be returned coherently to the ground state. Classical and quantum calculations support this interpretation.