05286532

j

05286532 Ma, Jun-Mao Jiao, Zhi-Yong Li, Ning Entropy and entanglement of a single-mode vacuum field interacting with a $\Xi $-type three-level atom with detuning. Int. J. Theor. Phys. 47, No. 2, 350-356 (2008). 2008 Springer, New York, NY EN single-mode field $\Xi $-type three-level atom entropy evolution entanglement

doi:10.1007/s10773-007-9456-5

Summary: The evolution of the field entropy and the entanglement between the atom and the field for the system of a single-mode vacuum field interacting with a $\Xi$-type three-level atom have been studied by using the reduced quantum entropy. The influences of the detuning of the light field and the setting of the initial state of the atom on the field entropy and entanglement of the system under consideration are discussed emphatically. It is showed that the detuning of the light field and the setting of the initial state of the atom play an important role for the evolution of the field entropy and the entanglement between the atom and the field. The general conclusions reached are illustrated by numerical results.