摘要
本文研究了奇偶相干态的高阶压缩和它们的各种准概率分布函数,结果表明,这两个态的高阶压缩性质是相互排斥的,特征函数和Wigner函数都不是高斯型,而且Wigner函数也不恒为正定,准概率密度(QPD)图形既不是椭圆,也不是月牙状,而是两叶花瓣状,显示出态的QPD图形不能说明态的压缩类型。
The higher-order squeezing and quasiprobability distribution function of even and odd coherent states are studied in this paper. The results show that the properties of higher-order squeezing of the two states exclude each other, and characteristic functions and Wigner functions are all not gaussian. Particularly, Wigner functions can not be perseved positive define. Quasiprobability density (QPD) of the two states are neither 'elliptic' nor 'crescent', but are two-petal-like shape, which shows that squeezing type can not be represented by the QPD figure of a state.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
1991年第3期386-392,共7页
Acta Physica Sinica
