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 and SPASSC superposition states. Hollow points: the squeezing parameter λ = 0, i.e., the SPASC superposition states. Solid points: the SPASSC superposition states with the squeezing parameter λ = 0.2. The circle, star, triangle, and rectangle points correspond to k = 0.5, 1.0, 1.5, and 3.0, respectively.