任意两个相干态的叠加及其量子统计性质

研究了由两个任意相干态构成的叠加态｜ψ〉=a｜β〉+be^iφ｜mβe^iδ 〉的量子统计性质，结果表明此种叠加态普遍存在着压缩效应或光子反群聚效应.叠 加态的量子效应依赖于β²和振幅系数m，同时改变相干态间的位相差δ和叠加 系数间的位相差φ也将对叠加态的压缩效应或反群聚效应起着重要的作用. 关键词： 相干态 叠加态 压缩效应 反群聚效应

Superposition of two arbitrary coherent states and its quantum statistical properties

In this paper, the quantum statistical properties of the superposition state,a｜ β〉+be^iφ｜mβe^iδ〉,which involves two arbitrary coh erent states, are investigated. The results show that this kind of super-positio n states generally exhibits squeezing effect or anti-bunching effect. The quantu m effects of the superposed state depend on β² and the amplitude coe fficient m, as well as the changes of the phase difference between two coherent states δ, and the phase difference between two superposition coefficients φ al so plays an important role in squeezing or anti-bunching effects.