The entropy evolution property of a single-mode light field interacting with V-type three-level atoms via intensity-dependent coupling has been studied, and the influence of detuning of light field and initial photon number on entropy evolution of field is discussed. It is found that if detuning is relatively small and initial light field weak, the time-evolution behavior of field entropy is similar to that of Jaynes-Cummings model with single-photon transition, but in case of sufficient large detuning and strong initial light field, the time-evolution behavior of field entropy is similar to t...
