三态叠加多模Schrdinger-cat态纠缠光场的不等幂次高次差压缩

The Difference Squeezing of Unequal Power Higher Power in the Multimode Schrdinger - Cat State Entangled Light Field with Three Quantum States Superposition

引入了由多模复共轭相干态、多模复共轭虚相干态和多模真空态的线性叠加所组成的三态叠加多模Schr dinger-cat态纠缠光场,利用多模压缩态理论研究了这种光场的广义非线性不等幂次高次差压缩特性。结果发现:①真空场对此猫态光场的不等幂次高次差压缩效应没有影响;②在一定条件下,此猫态光场的两个正交相位分量可分别呈现出不等幂次高次差压缩效应;而在另外的条件下,此猫态光场的两个正交相位分量则可同时出现上述的不等幂次高次差压缩效应。

By using the general theory of multimode squeezed states, the difference squeezing of generalized nonlinear unequal - power higher - power in the multimode Schrodinger -cat state entangled light field is studied in detail. This light field is formed by linear superposition from three quantum states, i.e. multimode complex conjugation coherent state, multimode complex conjugation imaginary coherent state and multimode vacuum state. The conclusion shows that 1) the difference squeezing of the cat state entangled light field is independent of the vacuum state; 2) when certain conditions are satisfied, the two quadrature phases of this cat state entangled light field present unequal - power higher - power difference squeezing properties respectively, and under some other conditions, the difference squeezing effects of two quadrature phases can be displayed at the same time. The former is in conformity with the uncertainty principle. But the later is not, and is called 'two-sides difference squeezing' considering the application of squeezed light in the light communication.