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arXiv 0705.2518cond-mat.other
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玻色-爱因斯坦凝聚体中的强脉冲超辐射光谱

Spectroscopy of Strong-Pulse Superradiance in a Bose-Einstein condensate

Nir Bar-Gill, Eitan E. Rowen, Nir Davidson

摘要:

利用双频泵浦光,对玻色-爱因斯坦凝聚体中的超辐射现象进行了实验研究。通过控制光束分量之间的频率差,我们测量了后向(能量失配)超辐射原子模的光谱。此外,我们表明,这些模式的人口显示相干的时间动力学。这些结果进行了比较耦合薛定谔-麦克斯韦方程组的基础上的半经典模型。

英文摘要:

We study experimentally superradiance in a Bose-Einstein condensate using a two-frequency pump beam. By controlling the frequency difference between the beam components, we measure the spectrum of the backward (energy-mismatched) superradiant atomic modes. In addition, we show that the populations of these modes display coherent time-dynamics. These results are compared to a semi-classical model based on coupled Schroedinger-Maxwell equations.

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