Two qubit entanglement when the RWA is violated
Shantanu Agarwal, Seyed Mohammad Hashemi Rafsanjani, Joseph H. Eberly · 2012
We investigate the entanglement dynamics of two quasi-degenerate qubits interacting with a quantized oscillator in a parameter regime where the rotating wave approximation breaks down. Analytical formulas for collapse and revival of entanglement are derived.