Quantum optical interferometry via general photon-subtracted two-mode squeezed states
Hou Li-Li, Xue Jian-Zhong, Sui Yong-Xing, Wang Shuai
       

Phase sensitivity Δ φ as a function of the phase shift φ for z=0.8 and some values of (k,l) when the PS-TMSVS is considered as interferometer states.