有限温度下光晶格中玻色凝聚的信号
Signal of Bose condensation in an optical lattice at finite temperature
摘要：
讨论了有限温度下冷原子在光晶格中玻色凝聚的实验信号。而不是使用通过飞行时间成像的干涉图案的可见性，我们表明，在第一布里渊区的动量空间密度分布，特别是其双峰分布，提供了一个明确的玻色凝聚信号。我们证实了这一点，详细计算的变化，在整个凝聚相变的原子动量分布，同时考虑到全球捕获势和原子相互作用的影响。
英文摘要：
We discuss the experimental signal for the Bose condensation of cold atoms in an optical lattice at finite temperature. Instead of using the visibility of the interference pattern via the time-of-flight imaging, we show that the momentum space density profile in the first Brillouin zone, in particular its bimodal distribution, provides an unambiguous signal for the Bose condensation. We confirm this point with detailed calculation of the change in the atomic momentum distribution across the condensation phase transition, taking into account both the global trapping potential and the atomic interaction effects.
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