Robustness of nonclassicality for superposed two coherent states Lei-lei Wang, Han-xi Gao, Rong-rong Ding, Li-zhen Jiang and Xiao-yu Chen Eur. Phys. J. Plus, 139 1 (2024) 17 Published online: 04 January 2024 DOI: 10.1140/epjp/s13360-023-04805-5