Atom–field entanglement in the Jaynes–Cummings model without rotating wave approximation
Mirzaee M†, Batavani M.
       
The plot of the population inversion of atomic levels ( W = ρee – ρgg ) versus time for JCM with RWA (a) g = 0.01, (b) g = 0.1, and (c) 1.