Observation of a red-blue detuning asymmetry in matter-wave superradiance

We report the first experimental observations of strong suppression of matter-wave superradiance using blue-detuned pump light and demonstrate a pump-laser detuning asymmetry in the collective atomic recoil motion. In contrast to all previous theoretical frameworks, which predict that the process sh...

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Bibliographic Details
Published inarXiv.org
Main Authors Deng, L, Hagley, E W, Cao, Qiang, Wang, Xiaorui, Luo, Xinyu, Wang, Ruquan, Yang, Fan, Zhou, Xiaoji, Chen, Xuzong, Payne, M G, Zhan, Mingsheng
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 29.10.2010
Subjects
Asymmetry
Condensates
Physics - Quantum Gases
Physics - Quantum Physics
Recoil
Symmetry
Wave scattering
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Summary:We report the first experimental observations of strong suppression of matter-wave superradiance using blue-detuned pump light and demonstrate a pump-laser detuning asymmetry in the collective atomic recoil motion. In contrast to all previous theoretical frameworks, which predict that the process should be symmetric with respect to the sign of the pump-laser detuning, we find that for condensates the symmetry is broken. With high condensate densities and red-detuned light, the familiar distinctive multi-order, matter-wave scattering pattern is clearly visible, whereas with blue-detuned light superradiance is strongly suppressed. In the limit of a dilute atomic gas, however, symmetry is restored.
ISSN:2331-8422
DOI:10.48550/arxiv.1006.1295