Spectral Characterization of Couplings in a Mixed Optomechanical Model *

Yue-Hui Zhou,Fen Zou,Xi-Ming Fang,Jin-Feng Huang,Jie-Qiao Liao

Fig. 5 (Color online) The emission spectrum $S(\Delta_{k})\omega_{ M}$ as a function of $\Delta_{k}/\omega_{ M}$ when the mechanical resonator is initially in different states: (a) single-photon squeezed displaced ground state $|\tilde{0}(1)\rangle_{b}$, (b) ground state $|0\rangle_{b}$, (c) coherent state $|\alpha\rangle_{b}$ with $\alpha=1$, and (d) thermal state $\rho_{\text{th}}$ with the average thermal phonon number $\bar{n}_{\text{th}}=1$. Other parameters are given by $g_{1}/\omega_{ M}=0.8$, $g_{2}/\omega_{ M}=0.05$, and $\kappa/\omega_{ M}=0.02$.