Wigner function for squeezed negative binomial state and evolution of density operator for amplitude decay
Lv Heng-Yun1, Wang Ji-Suo2, Zhang Xiao-Yan1, Wu Meng-Yan1, Liang Bao-Long1, Meng Xiang-Guo1, †
       

The WF distributions for SNBS with a fixed squeezing r=0.4 and the different values of the parameters ( s , γ ) : (a) (0,0.5), (b) (5,0.5), (c) (5,0.9) and, (d) (100,1).