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arXiv quant-ph/0309203quant-ph
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光的纠缠自相位锁定态

Entangled self-phase locked states of light

H. H. Adamyan, G. Yu. Kryuchkyan

摘要:

我们详细探讨了产生具有良好局域相位的光场连续变量纠缠态的可能性。我们证明了这种量子态,称为纠缠自锁相态,可以在基于II型相位匹配下转换和偏振混合器的非简并光参量振荡器中产生.一个量子理论的这种设备,最近在实验中实现,开发的亚阈值和阈值以上的操作制度。我们表明,系统提供两个产生的模式之间的相对相位相干性也表现出不同类型的光子数和这些模式的相位之间的量子相关性。我们量化的纠缠作为双模压缩,并表明CV纠缠实现了单一的,非耗散动力学和耗散NOPO在整个范围内的泵浦场强度。

英文摘要:

We explore in detail the possibility of generation of continuous-variable (CV) entangled states of light fields with well-localized phases. We show that such quantum states, called entangled self-phase locked states, can be generated in nondegenerate optical parametric oscillator (NOPO) based on a type-II phase-matched down-conversion combined with polarization mixer in a cavity. A quantum theory of this device, recently realized in the experiment, is developed for both sub-threshold and above-threshold operational regimes. We show that the system providing relative phase coherence between two generated modes also exhibits different types of quantum correlations between photon numbers and phases of these modes. We quantify the entanglement as two-mode squeezing and show that CV entanglement is realized for both unitary, non-dissipative dynamics and for dissipative NOPO in the entire range of pump field intensities.

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