Kerr介质对双模压缩真空场与四能级原子相互作用系统中光场量子特性的影响

Influences of Kerr medium on the quantum properties of field of the system of two-mode squeezed vacuum field interacting with four-level atom

研究了旋波近似下Kerr介质中双模压缩真空场与N型四能级原子双光子跃迁相互作用系统中光场的压缩效应及光子的统计性质 .数值计算结果表明 ,在无Kerr介质的情况下 ,光场的两个正交分量的均方涨落均呈现周期性的压缩 ,光子周期性地交替呈现聚束和反聚束效应 ,光场两模之间总是呈现正相关 ,而且这种相关是非经典相关 ;Kerr介质的存在不利于光场均方涨落的压缩 。

The field squeezing effects and photon statistic properties of system of two\|mode squeezed vacuum field interacting with N\|type four\|level atom in Kerr medium are studied. The results obtained by means of numerical method show that, if the medium is not present, the fluctuations of two quadrature components of light can be squeezed periodically, and the photon bunching and anti\|bunching appear alternately, and the correlation of the two mode of light is both positive and non\|classical. The Kerr medium restrains the field squeezing but doesn't change the photon statistic properties.