腔内混合态原子系统中辐射场的N次方压缩

应用熵最大原理，研究了腔内二能级混合态系统场振幅的高阶压缩效应，结果表明，在腔场的弱激发下，只有初始布居几率为纯态或紧靠纯度的状态下才可出现压缩，而偏离纯态较大的混合态则不存在压缩。

Nth Power Squeezing of the Radiation Field in a Cavity with Mixed State Atomic System

The properties of Nth power squeezing of field amptitude in a cavity with two level mixed state atomic systems are studied by using the principle of maximal entropy. the present results show that, when the initial exciting of the squeezing of field amptitude can appear only in the state that the atom is initially in a pure state or very close to the pure state, the squeezing of field amptitude can not appear in the state, as the atom is initially in an arbitrary statistical mixed state. When the initial exciting of field become intensive, the squeezing of field amptitude can appear in an arbitrary statistical mixed state. The more intensive the exciting field is, the deeper the field amptitude squeezing. On the other hand, different power squeezings of field amptitude have different depths and time intervals squeezing appeared even if it is under the same exciting intension. The above results are keeping with the interaction theory of two level atom systems with a radiation field.