Figure 4

The logarithmic negativity EN versus the environment temperature T when the coupling strength is set to be J = ωm.
Here Δ = ωm, γm = 10−6 ωm, and the other parameters are given in Table 1.

The logarithmic negativity EN versus the environment temperature T when the coupling strength is set to be J = ωm.
Here Δ = ωm, γm = 10−6 ωm, and the other parameters are given in Table 1.