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arXiv 1403.8041cond-mat.quant-gas
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耗散玻色-爱因斯坦凝聚体的相位涨落和一阶关联函数

Phase fluctuations and first-order correlation functions of dissipative Bose-Einstein condensates

A. -W. de Leeuw, H. T. C. Stoof, R. A. Duine

摘要:

研究了有限寿命对耗散玻色-爱因斯坦凝聚体一阶关联函数的影响。通过考虑相位起伏的所有订单,我们表明,有限寿命的影响是可以忽略的空间一阶关联函数,但有一个重要的影响的时间相关性。作为应用,我们计算了光子准凝聚体的单粒子密度矩阵。最后,我们还考虑了正常态的光子,我们证明了有限寿命效应降低了空间和时间的一阶关联函数。

英文摘要:

We investigate the finite lifetime effects on first-order correlation functions of dissipative Bose-Einstein condensates. By taking into account the phase fluctuations up to all orders, we show that the finite lifetime effects are neglible for the spatial first-order correlation functions, but have an important effect on the temporal correlations. As an application, we calculate the one-particle density matrix of a quasi-condensate of photons. Finally, we also consider the photons in the normal state and we demonstrate that the finite lifetime effects decrease both the spatial and temporal first-order correlation functions.

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