双模压缩数态光场的Wigner函数及其特性

Wigner function of two-mode squeezed number state and its properties

借助纠缠态表象及Wigner算符在该表象下的表示,得到双模压缩数态的Wigner函数,数值计算画出相空间中Wigner函数的分布图,并加以分析,发现双模压缩数态两模之间相互关联、相互纠缠,对相空间中Wigner函数分布产生影响.

By means of the entangled state representation as well as the Wigner operator in such a representation,the Wigner function of the two-mode squeezed number states is derived.The properties of corresponding Wigner function in the phase space are discussed by numerical calculation.The results indicate that Wigner function distribution in the phase space should be influenced by the correlation and the entanglement between two modes of two-mode squeezed number state.