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Decoherence of Superradiant Scattering from Atoms without Confinement |
| WEN Ming-Xuan, NIU Lin-Xiao, WANG Zhong-Kai, ZHAI Yue-Yang, CHEN Xu-Zong, ZHOU Xiao-Ji** |
School of Electronics Engineering and Computer Science, Peking University, Beijing 100871
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| Cite this article: |
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WEN Ming-Xuan, NIU Lin-Xiao, WANG Zhong-Kai et al 2013 Chin. Phys. Lett. 30 060304 |
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Abstract We study the decoherence of superradiant Rayleigh scattering from condensed atoms without confinement, by using two same pumping pulses with an interval time. The first pulse is to establish a matter-wave grating, and the coherence between different momentum modes is measured by the second pulse after a variable interval time. Different from the case in the trap, the distruction of the grating owing to the phase perturbation is very fast, and the superradiant process is inhibited very soon afterwards for released atoms. A semi-classical model is applied to simulate this phase perturbation, and the calculation agrees with our experimental results.
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Received: 01 April 2013
Published: 31 May 2013
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| PACS: |
03.75.Gg
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(Entanglement and decoherence in Bose-Einstein condensates)
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42.50.Gy
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(Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)
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42.50.Ct
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(Quantum description of interaction of light and matter; related experiments)
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32.80.-t
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(Photoionization and excitation)
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