摘要
引入平移激发压缩真空态Ｄ（ｚ）ａ＋ ｍＳ（ｒ）｜０〉，并讨论它的一些基本性质．利用正规乘积内的积分技术，证明了其完备性．平移激发以后，与压缩真空态相比较，光子数分布的振荡性质更加显著．与压缩真空态的光子总是聚束的性质不同，在平移参量｜ｚ｜和激发数ｍ 都较小时，平移激发压缩真空态的光子统计关联可以呈现反聚束效应．计算了它的准概率分布函数（Ｑ 函数和Ｗｉｇｎｅｒ 函数） ，并讨论了它们对各参量的依赖关系，从Ｗｉｇｎｅｒ
We introduce the states D(z)a\+\{+\+m\}S(r)|0〉 and examine their properties. Such states are checked to be complete vectors via the IWOP (Integration Within an Ordered Product of operators) technique. We find larger\|scale macroscopic oscillations of photon distribution after the squeezed vacuum states being excited and displaced. On contrary to the bunching photons of the squeezed vacuum states, as the displacing parameter | z | and the excitation number m are both small, photons coherence can exhibit antibunching effect. The quasi\|probability distribution functions (Husimi Q (α,α\+*) function and Wigner W(q,p) function) are derived and their dependences on the three parameters ( z,m,r ) are discussed. The Wigner function obviously displays their nonclassical feature.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第1期74-79,共6页
Acta Physica Sinica
基金
教育部博士点基金
