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arXiv quant-ph/9801050quant-ph
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下落冷原子云中的原子序数涨落

Atomic number fluctuations in a falling cold atom cloud

A. Lambrecht, E. Giacobino, S. Reynaud

摘要:

我们评估的有效原子数的实验中,探测激光束与高斯分布通过一个原子介质组成的冷原子云释放的磁光阱。考虑初始分布是位置和速度的高斯函数的情况,给出了云爆炸和下落过程中有效原子数随时间变化的定量描述。我们讨论了两种情况下的有效数定义的线性和非线性相移,分别。我们还通过计算有效原子数的关联函数和相关的噪声谱来估计原子数的涨落。最后,我们估计了这些波动对探测束穿过包含原子云的腔的实验的影响。

英文摘要:

We evaluate the effective number of atoms in experiments where a probe laser beam with a Gaussian profile passes through an atomic medium consisting of a cold atom cloud released from a magneto-optical trap. Considering the case where the initial distribution is a Gaussian function of position and velocity, we give a quantitative description of the time variation of the effective atom number while the cloud is exploding and falling. We discuss the two cases where the effective number is defined from the linear and nonlinear phase shifts, respectively. We also evaluate the fluctuations of the effective atom number by calculating their correlation functions and the associated noise spectra. Finally we estimate the effect of these fluctuations on experiments where the probe beam passes through a cavity containing the atomic cloud.

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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