Reservoir-engineered entanglement in an unresolved-sideband optomechanical system

Yang-Yang Wang,Rong Zhang,Stefano Chesi,Ying-Dan Wang

Figure 3. (a) The logarithmic negativity EN. (b) The quantity $V\equiv \langle {\hat{X}}_{+}^{2}\rangle +\langle {\hat{P}}_{-}^{2}\rangle $ entering the Duan inequality with equation (13). The red , blue, orange lines are with G2 = 0.2ωm, 0.1ωm, 0.05ωm, respectively. Other parameters: δ = 0.01ωm, γ = 10−5ωm, κc = 5ωm, Δ1 = −Δ2 = 2ωm, κ1 = κ2 = 0.3ωm, J1 = J2 = 5ωm , nth = 5.