Generation of tripartite Einstein–Podolsky–Rosen steering by cascaded nonlinear process
Liu Yu1, Liang Su-Ling1, Jin Guang-Ri1, Yu You-Bin1, †, Lan Jian-Yu2, He Xiao-Bin2, ‡, Guo Kang-Xian3
       

(a) Sketch of the optical cavity, (b) quasi-phase-matching schematic diagram for the cascaded nonlinear interaction process.