Reservoir-engineered entanglement in an unresolved-sideband optomechanical system

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

Figure 2. The logarithmic negativity EN versus κc/ωm in four representative cases. All the lines are obtained with the optimal ropt = G1/G2 at fixed G2. Sold blue and red lines refer to δ = 0 and δ = 0.01ωm, respectively, with cavity coupling strength J1 = J2 = J = 5ωm. The dotted lines are without two auxiliary cavities. The green-dashed line is ${E}_{N}=\mathrm{ln}2$. Other parameters: G2 = 0.1ωm, γ1 = γ2 = 10−5ωm, Δ1 = −Δ2 = 2ωm, κ1 = κ2 = 0.3ωm, nth = 0.