Fig. 4: Petermann factor \({\mathcal{K}}\) corresponding to three system eigenfrequency λ1 (black), λ2 (blue), and λ3 (red) versus Gma/Δa.
From: Steering entanglement through exceptional points in non-hermitian cavity magnomechanics
a, b are for non-hermitian strength Γ/ωb = 1.0 and Γ/ωb = 2.0, respectively, at Gmb = 0.09Δm. While c corresponds to the effects of Gmb = 1.0Δm, at Γ/ωb = 1.0. The remaining numerical parameters are the same as in Fig. 2.
