光子数迭加态光场的位相特性

Phase Properties of the Photo Number Superposition State Light

用Pegg－Barnett位相理论研究了光子数迭加态的位相特性。位相概率密度总是呈正弦分布的。n光子态与真空态的迭加态的位相概率密度函数的周期为，n=1时迭加态的位相平均值即为两个迭加系数的相对位相。

Phase properties of the photon number superposition states are studied using the Pagg-Barnett phase theory. The phase probahility density function of n-photon superpositionstate has a period of , and the phase mean value of superposition state for n=1 is thephase differencc of the coefficients of the two superposition states.