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arXiv quant-ph/0312137quant-ph
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II型二次谐波发生器腔反射次谐波模的纠缠特性

Entanglement characteristics of subharmonic modes reflected from cavity for type II second harmonic generation

Zehui Zhai, Yongming Li, Jiangrui Gao

摘要:

从理论上分析了第二类倍频光腔中泵浦光场的量子涨落和量子纠缠。从泵浦参数、腔内损耗和归一化频率的角度解释了反射次谐波场的正交分量之间的相关谱。在三谐振腔中,在音叉分叉发生之前,振幅和相位的求积都可以获得大的相关度。两个反射的次谐波光场处于纠缠态,相位求积存在量子关联,振幅求积存在量子纠缠关系。该系统可以作为一种新的连续变量纠缠态的产生源。

英文摘要:

Quantum fluctuation and quantum entanglement of the pump field reflected from an optical cavity for type II second harmonic generation are theoretically analyzed. The correlation spectra between the quadratures of the reflected subharmonic fields are interpreted in terms of pump parameter, intracavity losses and normalized frequency. Large correlation degrees of both amplitude and phase quadratures can be accessed in a triple resonant cavity before the pitchfork bifurcation occurs. The two reflected subharmonic fields are in an entangled state with the quantum correlation of phase quadratures and anticorrelation of amplitude quadratures. The proposed system can be exploited to be a new source generating entangled states of continuous variables.

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