Measurement of the spatial correlation function of phase fluctuating Bose-Einstein condensates.
Measurement of the spatial correlation function of phase fluctuating Bose-Einstein condensates.
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DOI：
10.1103/physrevlett.91.010406
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发表时间：
2003-03
影响因子：
8.6
通讯作者：
D. Hellweg;L. Cacciapuoti;M. Kottke;T. Schulte;K. Sengstock;W. Ertmer;J. Arlt
中科院分区：
文献类型：
--
作者：
D. Hellweg;L. Cacciapuoti;M. Kottke;T. Schulte;K. Sengstock;W. Ertmer;J. Arlt
我们测量了相位波动玻色-爱因斯坦凝聚体的两个干扰空间位移副本的强度相关函数。结果表明，这对应于初始冷凝物的相位相关特性的测量。与 Hanbury Brown 和 Twiss 的恒星干涉仪实验中使用的方法类似，我们使用空间强度相关性来确定细长凝聚体的相位相干长度。我们发现与我们对相关函数的预测非常一致，并确认了预期的相干长度。
We measure the intensity correlation function of two interfering spatially displaced copies of phase fluctuating Bose-Einstein condensates. It is shown that this corresponds to a measurement of the phase correlation properties of the initial condensate. Analogous to the method used in the stellar interferometer experiment of Hanbury Brown and Twiss, we use spatial intensity correlations to determine the phase coherence lengths of elongated condensates. We find good agreement with our prediction of the correlation function and confirm the expected coherence length.