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ENTANGLEMENT CONTROLLING OF A THREE-LEVEL CASCADE ATOM INTERACTING WITH A TIME-DEPENDENT COHERENT FIELD

SHUANGYUAN XIE

Department of Physics, Tongji University, Shanghai 200092, China

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FEI JIA

Department of Physics, Tongji University, Shanghai 200092, China

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, and

YAPING YANG

Department of Physics, Tongji University, Shanghai 200092, China

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https://doi.org/10.1142/S0219749909005444Cited by:1 (Source: Crossref)

Abstract

The interaction between a three-level cascade atom and an initial coherent field with a time-varying frequency has been investigated, including the dynamic behavior of the atomic level occupation probabilities and the entanglement between the atom and the field. The frequency of the field is modulated in the forms of sine and rectangle. It is found that the field-frequency variation has a great influence on the properties of the generalized Jaynes-Cummings model. Appropriate frequency modulation can enhance and stabilize the degree of entanglement between the atom and the field.

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