有限温度玻色-爱因斯坦凝聚气体在非玻色-费米区的自由降落膨胀
Free-fall expansion of finite-temperature Bose-Einstein condensed gas in the non Thomas-Fermi regime
摘要：
本文报道了对~（87）Rb的有限温度玻色-爱因斯坦凝聚云的自由降落膨胀的研究。实验是在原子总数可变的情况下进行的，同时保持冷凝物中原子的数量恒定。结果表明，BEC动力学依赖于与热分数的相互作用。特别是，它们提供了热云压缩冷凝物的实验证据。
英文摘要：
We report on our study of the free-fall expansion of a finite-temperature Bose-Einstein condensed cloud of 87Rb. The experiments are performed with a variable total number of atoms while keeping constant the number of atoms in the condensate. The results provide evidence that the BEC dynamics depends on the interaction with thermal fraction. In particular, they provide experimental evidence that thermal cloud compresses the condensate.
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