Non-Gaussian quantum states generation and robust quantum non-Gaussianity via squeezing field*
Tang Xu-Binga),b), Gao Fangb), Wang Yao-Xiongb), Kuang Senc), Shuang Fengb),c)†
       
Non-Gaussianity of the SPASC superposition states varies with phase (a), amplitude (b, c), and ratio (d). (a), From up to down, the sizes of input field are 0.3, 1.0, 2.0, and 3.0 with different relative proportion parameter values: 0.5 (empty-up-triangle points), 1.0 (plus points), 1.5 (filled-circle points), and 3.0 (five-pointed star). (b, c) The non-Gaussianity varies with amplitude for different values of ratio k (these values are put at intervals of 0.2 in (b) and 0.5 in (c)). (d) The maximum points are related to the ratio k with different amplitude | α | of 0.3 (dashed line), 1.5 (dotted line), and 3.0 (dash-dotted line), respectively.