Some studies of the interaction between two two-level atoms and SU(1, 1) quantum systems
El-Shahat T M , Ismail M Kh
       

(color online) The time evolution of quantum discord in the absence of the qubit motion effect with different values of r ∈ [0,1] for ka = kb = 1/2 and ma = mb = 1. Panel (a) for Δ/λ = 0 and panel (b) for Δ/λ = 10.