Quantum interferometry via a coherent state mixed with a squeezed number state

Hou Li-Li¹, Sui Yong-Xing¹, Wang Shuai^{1, †}, Xu Xue-Fen^{2, ‡}

(a) For given n ¯ SNS = n ¯ SVS = 16 and z = 10, the phase sensitivity Δ φ as a function of the phase shift φ when the SNS-coherent state, and the SVS-coherent state as interferometer states; (b) For given n ¯ SNS = n ¯ SVS = 16 and φ =0.15, the phase sensitivity Δ φ as a function of the total mean photon number. Only the parameter z is changed.