Critical fluctuations in an optical parametric oscillator: when light behaves like magnetism
Critical fluctuations in an optical parametric oscillator: when light behaves like magnetism
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DOI：
10.1364/josab.33.000871
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发表时间：
2016-05-01
影响因子：
1.9
通讯作者：
Drummond, Peter D.
中科院分区：
文献类型：
--
作者：
Dechoum, Kaled;Rosales-Zarate, Laura;Drummond, Peter D.
本文研究了平面干涉仪中的非简并光参量振荡器在阈值附近的临界现象。这些现象与非平衡量子动力学有关，已知非平衡量子动力学会导致振荡器场模式中的正交纠缠和压缩。我们得到了一个通用的形式描述这个系统的方程，它允许与其他相变的比较。我们发现该系统的非压缩求积对应于一个具有三临界Lifshitz点的二维XY型模型。这使得对这类不寻常的统计模型进行受控实验研究的可能性成为可能。我们使用精确的数值模拟和高斯近似的非压缩正交的相关性进行评估，并获得非高斯相关性的精确数值计算。(C)2016美国光学学会
We study the nondegenerate optical parametric oscillator in a planar interferometer near threshold, where critical phenomena are expected. These phenomena are associated with nonequilibrium quantum dynamics that are known to lead to quadrature entanglement and squeezing in the oscillator field modes. We obtain a universal form for the equation describing this system, which allows a comparison with other phase transitions. We find that the unsqueezed quadratures of this system correspond to a two-dimensional XY-type model with a tricritical Lifshitz point. This leaves open the possibility of a controlled experimental investigation into this unusual class of statistical models. We evaluate the correlations of the unsqueezed quadrature using both an exact numerical simulation and a Gaussian approximation, and obtain an accurate numerical calculation of the non-Gaussian correlations. (C) 2016 Optical Society of America