The Hanbury Brown-Twiss effect in a pulsed atom laser.
The Hanbury Brown-Twiss effect in a pulsed atom laser.
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DOI：
10.1364/oe.18.018712
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发表时间：
2010-08
期刊：
影响因子：
3.8
通讯作者：
A. Manning;S. Hodgman;R. Dall;M. Johnsson;A. Truscott
中科院分区：
文献类型：
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作者：
A. Manning;S. Hodgman;R. Dall;M. Johnsson;A. Truscott
我们利用Hanbury Brown-Twiss效应直接比较了脉冲原子激光和亚稳氦脉冲超冷热源的密度关联。结果发现，各向同性的射频耦合的原子从玻色-爱因斯坦凝聚体不会导致退相干，而“聚束”典型的非相干源观察到热原子。与以前的测量相比，这种新方法显着提高了数据采集速率，并且还允许未来的新实验，这可能使我们能够通过监测相关效应来探测冷凝物的诞生和死亡等过程。
We have used the Hanbury Brown-Twiss effect to directly compare the density correlations of a pulsed atom laser and a pulsed ultracold thermal source of metastable helium. It was found that the isotropic RF outcoupling of atoms from a Bose-Einstein condensate does not result in decoherence, while the 'bunching' typical of incoherent sources was observed for thermal atoms. This new method significantly increases data acquisition rates compared to previous measurements, and also permits future novel experiments which may allow us to probe processes such as the birth and death of a condensate by monitoring correlation effects.