Signature of existence of a BEC-type state in a dilute gas above the BEC transition temperature

Yinbiao Yang; Wen-ge Wang

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arXiv · 1408.2440

Signature of existence of a BEC-type state in a dilute gas above the BEC transition temperature

Yinbiao Yang·Wen-ge Wang

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Abstract

We study quantum coherence properties of a dilute gas at temperatures above, but not much above the transition temperature of Bose-Einstein condensation (BEC). In such a gas, a small proportion of the atoms may possess coherence lengths longer than the mean neighboring-atomic distance, implying the existence of quantum coherence more than that expected for thermal atoms. Conjecturing that a part of this proportion of the atoms may lie in a BEC-type state, some unexplained experimental results [Phys. Rev. A, 71, 043615 (2005)] can be explained.

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Yinbiao Yang, Wen-ge Wang. 2014-08-08. Signature of existence of a BEC-type state in a dilute gas above the BEC transition temperature. https://arxiv.org/abs/1408.2440

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