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arXiv 1206.0845cond-mat.quant-gasquant-ph
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稀玻色-爱因斯坦凝聚体的增强后向散射

Enhanced backscattering of a dilute Bose-Einstein condensate

Guillaume Labeyrie, Tomasz Karpiuk, Jean-François Schaff, Benoît Grémaud, Christian Miniatura, Dominique Delande

摘要:

本文通过实验和数值计算研究了以$v_0$速度发射的$^{87}$ Rb玻色-爱因斯坦凝聚体在散斑产生的无序光学势中的准二维输运。飞行时间分析揭示了在后向散射方向$-v_0$上的显著增强的密度峰,这是使人联想到相干后向散射的特征。然而,详细的数值模拟表明,其他影响也有助于这种增强,包括“后向散射回波”由于初始波包的位置-动量相关性。

英文摘要:

We study experimentally and numerically the quasi-bidimensional transport of a $^{87}$Rb Bose-Einstein condensate launched with a velocity $v_0$ inside a disordered optical potential created by a speckle pattern. A time-of-flight analysis reveals a pronounced enhanced density peak in the backscattering direction $-v_0$, a feature reminiscent of coherent backscattering. Detailed numerical simulations indicate however that other effects also contribute to this enhancement, including a "backscattering echo" due to the position-momentum correlations of the initial wave packet.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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