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arXiv 1503.08424cond-mat.quant-gascond-mat.mes-hallquant-ph
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非平衡系统中玻色-爱因斯坦凝聚的量子处理

Quantum Treatment for Bose-Einstein Condensation in Non-Equilibrium Systems

H. Flayac, I. G. Savenko, M. Möttönen, T. Ala-Nissila

摘要:

我们开发了一种基于随机量子轨道的方法,用于非相干泵浦的相互作用玻色子系统,在热库中释放它们的能量。我们的方法可以研究系统的多功能相干特性。我们将此模型应用于半导体微腔中的激子极化激元。我们的研究结果表明,在最低能量模式的宏观占领伴随着时间和空间相干性的建立。我们发现,时间相干性表现出从热相干统计和空间相干性揭示了非对角长程序的过渡。

英文摘要:

We develop an approach based on stochastic quantum trajectories for an incoherently pumped system of interacting bosons relaxing their energy in a thermal reservoir. Our approach enables the study of the versatile coherence properties of the system. We apply the model to exciton polaritons in a semiconductor microcavity. Our results demonstrate the onset of macroscopic occupation in the lowest-energy mode accompanied by the establishment of both temporal and spatial coherence. We show that temporal coherence exhibits a transition from a thermal to coherent statistics and the spatial coherence reveals off-diagonal long-range order.

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