混合迭加态的高阶压缩

HIGHER ORDER SQUEEZING OF MIXED SUPERPOSITION STATES

本文详细计算一般的混合迭加态中△a_1和△a_2的k阶矩,应用Bloch矢量方法详细讨论混合迭加态中的高阶压缩,描写并定量计算,各阶压缩的压缩区域及压缩条件,讨论最佳压缩的条件,指出在高阶压缩的迭加态中,两个正交的分量a_1和a_2在某些条件可望同时被压缩,最后,试图对迭加态压缩的本质作一些探讨。

In this paper, we calculate the k-th moments of A<J, and A42 in mixed superposition states, discuss the higher-order squeezing in these states with Bloch vector. We also describe and calculate squeeze zones, and squeeze conditions in higher-order squeezing, discuss some optimum squeeze conditions. We conclude that two quadrature components a1 and a2 can be squeezed to higher-order at the same time under some conditions. Finally, we try to discuss the nature of squeeze in superposition states.