Intrinsic decoherence mechanisms in the microcavity polariton condensate
Intrinsic decoherence mechanisms in the microcavity polariton condensate
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DOI：
10.1103/physrevlett.101.067404
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发表时间：
2008-08-08
影响因子：
8.6
通讯作者：
Dang, Le Si
中科院分区：
文献类型：
--
作者：
Love, A. P. D.;Krizhanovskii, D. N.;Dang, Le Si
确定了控制极化激元玻色-爱因斯坦凝聚体（BEC）相位相干性的基本机制。结果表明，结合的数量波动和相互作用导致退相干与一阶相关函数的特征高斯衰减。这条线的形状，和长的衰减时间（类似于150 ps）的一阶和二阶相关函数，定量解释的量子光学模型，考虑到相互作用，波动，增益和系统中的损失。这种类型的相互作用有限的相干时间已被预测为原子BEC，但尚未被实验观察到。
The fundamental mechanisms which control the phase coherence of the polariton Bose-Einstein condensate (BEC) are determined. It is shown that the combination of number fluctuations and interactions leads to decoherence with a characteristic Gaussian decay of the first-order correlation function. This line shape, and the long decay times (similar to 150 ps) of both first-and second-order correlation functions, are explained quantitatively by a quantum-optical model which takes into account interactions, fluctuations, and gain and loss in the system. Interaction limited coherence times of this type have been predicted for atomic BECs, but are yet to be observed experimentally.