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An exact solution of the problem of two-atom one- and two-modeJaynes-Cummings model with intensity-dependent coupling is presented.Asymptotic solutions for system state vectors are obtained in the approximationof large initial coherent fields. The atom-field entanglement is investigatedon the basis of the reduced atomic entropy dynamics. The possibility of thesystem being initially in a pure disentangled state to revive into this stateduring the evolution process for both models is shown. Conditions and times ofdisentanglement are derived.

Atom-field entanglement in two-atom Jaynes-Cummings model with intensity-dependent coupling