三态叠加多模纠缠态光场退相干下的混态差压缩

利用多模压缩态理论,对由多模真空态、多模复共轭相干态及多模复共轭虚相干态三态线性叠加构成的多模纠缠态光场在退相干下的均匀混态时其等幂次差压缩特性进行了研究。结果表明,当满足不同的条件时,混态光场中不仅呈现该纠缠态的某一正交相位分量存在着广义非线性等幂次高次差压缩特性的普通差压缩现象,而且还呈现其两个正交相位分量同时存在广义非线性高次差压缩特性的“双边差压缩”现象。后者是一种与测不准关系相悖的全新的物理效应。

The Difference Squeezing of Mixed State for Multimode Entangled State Light Fields in Decoherence

The properties of equal-higher-power difference squeezing of multimode entangled state light - field composed of multimode complex conjugate coherent state, multimode complex conjugate imaginary coherent state and multimode vacuum state are studied by utilizing the multimode squeezing theory in decoherence. The results show that when some fixed conditions are satisfied the mixed entangled state light - field mentioned above not only has the equal - higher - power difference squeezing in one of the two quadratures but also displays the similar effects in the two quadratures simultaneously, that is called "two - sided difference squeezing". This is a newly physical phenomenon which contradicts the principle of uncertainty.