Continuous-Variable Pairwise Entanglement Based on Optoelectromechanical System

Figure 4

Microwave pairwise entanglement versus (a–c) temperature and (d–f) detuning ratio . (a) Model described in Figure 2, with for green short-dashed line, for red dashed line, and for blue dot-dashed line. (b–c) Model described in Figure 3, with $\Delta_ = −0.24$ $\omega_m$ for all trace. (d–e) The effective detuning of the first MC pair  =  = , of the second pair  =  = . A1 indicates the MC with detuning , and A2 for the MC with detuning in the first MC pair; B1 indicates the MC with detuning , and B2 for the MC with detuning in the second MC pair. The detuning ratio is ranging from −0.8 to 0.8 for (d) and from −0.02 to 0.02 for (e). (f) Model described in Figure 2 that contains 2-pair MCs; all MC shares the same detuning ratio . A1-B1 and A2-B2 traces for two MCs with same absolute value and same sign. A1-A2 trace represents two MCs with the same absolute value but opposite sign. Other unmentioned parameters are the same with the 2-pair model in Figure 2.

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