连续变量纠缠增强对实验参量的依赖关系

Dependence of Continuous Variable Entanglement Enhancement on Experimental Parameters

具有正交振幅和正交相位分量量子关联的连续变量量子纠缠态光场是进行量子信息和量子计算研究的最基本的资源。随着量子信息和量子计算研究的深入开展,为了实现高质量的信息传递和高效率的量子计算,必须尽可能提高所利用的纠缠态光场的纠缠度。基于光学参变过程量子纠缠增强是提高连续变量纠缠态光场纠缠度的一种有效方法,详细讨论了连续变量纠缠增强与非简并光学参变放大器各实验参量的关系,讨论了这些参量对纠缠增强的影响。计算结果将为优化利用非简并光学参变放大器构建的纠缠增强系统,进一步提高量子纠缠增强效率提供参考。

Continuous variable entangled state of light with quantum correlation in quadrature amplitude and quadrature phase is the key resource to realize quantum information and quantum computation processing. With the rapid development of quantum information and quantum computation, correlation degrees of entangled state of lights have to be enhanced to match the requirement of high-quality information transfer and high-efficiency quantum computation. Continuous variable entanglement enhancement is an efficient method for the generation of entangled state of light with high entangled degree. The relation between the continuous variable entanglement enhancement and the experimental parameters of non-degenerate optical parametric amplifier is calculated. The influence of these experimental parameters on the entanglement enhancement is also discussed. This provides the direct references for optimizing the continuous variable entanglement enhancement system consisting of non-degenerate optical parametric amplifier.