连续变量纠缠交换对系统物理参量的依赖关系

Dependences of Entanglement Swapping for Continuous Variables on Physical Parameters of Experimental System

以量子关联度和相干态量子离物传送的保真度为判据,在增益因子取1和取最佳值两种情况下,计算了纠缠交换的质量对探测效率,传输效率及初始关联参量的函数依赖关系。计算结果可给实验设计提供有用参考。

According to the criteria of the quantum correlation and the fidelity of quantum teleportation of a coherent state, the dependences of the quality of the entanglement swapping on the detection efficiencies, the transmission efficiencies and the initial correlation parameters are calculated in two cases of gain factor g=1 and g=optimal value, respectively. The results provide the useful references for the designs of the experimental systems.