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arXiv 1401.7825cond-mat.quant-gasquant-ph
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玻色-爱因斯坦凝聚体的经典场和量子测量

Classical fields and quantum measurement for Bose-Einstein condensate

Tomasz Górski, Kazimierz Rzążewski

摘要:

我们分析了玻色-爱因斯坦凝聚体的分裂过程和两个分离原子云的相互相干性。在经典场近似下,我们发现如果原子相互作用,如果我们考虑足够长的观测时间,云之间的相干性会降低。我们还表明,重组后,整个样品的连贯性恢复。如果分裂势保持足够的穿透性,则相干性不会完全退化。我们计算了这种时间平均测量的原子数差异的方差,并表明在低温下,它可以远低于泊松极限,就像在实验中观察到的那样。

英文摘要:

We analyze a process of splitting of the Bose-Einstein condensate and the mutual coherence of two separated atomic clouds. Within the classical fields approximation we show that coherence between clouds is degraded if atoms interact and if we account for the sufficiently long observation time. We also show, that upon recombination, the coherence across the sample is restored. The coherence is not fully degraded if the splitting potential remains sufficiently penetrable. We calculate the variance of atom number difference for this time-averaging measurement and show that for low temperatures it can be well below Poissonian limit like it was observed in the experiments.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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