Measuring the temporal coherence of an atom laser beam.
Measuring the temporal coherence of an atom laser beam.
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DOI：
10.1103/physrevlett.87.160404
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发表时间：
2001-04
影响因子：
8.6
通讯作者：
Michael Kohl;Theodor W. Hansch;Tilman Esslinger
中科院分区：
文献类型：
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作者：
Michael Kohl;Theodor W. Hansch;Tilman Esslinger
我们报道了从(87)Rb玻色-爱因斯坦凝聚体中提取的原子激光光束的时间相干性的测量。从势垒反射光束会产生驻波结构。从磁共振成像观察到的干涉图样的对比度，我们推导出原子激光光束的能量宽度是由输出耦合持续时间的傅里叶限制的。这给出了玻色-爱因斯坦凝聚体中时间位相波动的上限。
We report on the measurement of the temporal coherence of an atom laser beam extracted from a (87)Rb Bose-Einstein condensate. Reflecting the beam from a potential barrier creates a standing matter wave structure. From the contrast of this interference pattern, observed by magnetic resonance imaging, we have deduced an energy width of the atom laser beam which is Fourier limited by the duration of output coupling. This gives an upper limit for temporal phase fluctuations in the Bose-Einstein condensate.