Quantum metrology with two-mode squeezed thermal state: Parity detection and phase sensitivity
Li Heng-Mei1, †, , Xu Xue-Xiang2, Yuan Hong-Chun3, 4, Wang Zhen1
       

Phase sensitivity δϕ as a function of the total photon number N̄ at φ = 0 for input TMSVS (black solid line), SNL (blue dashed line), and HL (red dotdashed line).