维格纳分布函数
干涉测量
物理
负效应
海森堡极限
相(物质)
Q函数
灵敏度(控制系统)
功能(生物学)
量子力学
量子
数学
概率密度函数
统计
累积分布函数
量子纠缠
社会心理学
进化生物学
生物
工程类
电子工程
量子网络
心理学
作者
Chunli Liu,Lili Guo,Zhiming Zhang,Ya-Fei Yu
标识
DOI:10.1088/1674-1056/28/6/060704
摘要
Both the negativity of Wigner function and the phase sensitivity of an SU(1,1) interferometer are investigated in this paper. In the case that the even coherent state and squeezed vacuum state are input into the interferometer, the Heisenberg limit can be approached with parity detection. At the same time, the negativity volume of Wigner function of detection mode comes entirely from the input state and varies periodically with the encoding phase. In addition, the negativity volume of Wigner function is positively correlated with the phase sensitivity of the SU(1,1) interferometer. The positive correlation may mean that the non-classicality indicated by negative Wigner function is a kind of resource that can verify some related research results of phase estimation.
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