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Acta Sinica Quantum Optica

Quantum Properties of the Field in the System of the Cascade Three-level Atom Interacting with Coherent State Field

LU Dao-ming

Published Jan 1, 2010• 0 citations
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Abstract

The squeezing and antibunching effects of the field in the system of the cascade three-level atom interacting with coherent state field are investigated.The influences of the selective atomic measurement on the squeezing and antibunching effects of the field are discussed.

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Considering two Λ-type three-level atoms initially in the entangled state, one atom is poured into the cavity and interacts with a two-mode cavity. The squeezing and antibunching effects of the field are investigated. The influences of the selective atomic measurement and the intensity of the coherent field, which interacts with atom on squeezing and antibunching effect of the field, are discussed. The results obtained by numerical calculations show that squeezing and antibunching effect of the field can be strengthened through selective atomic measurement for atom outside of the cavity.
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The entropic squeezing properties of the field in the system of the cascade three-level atom interacting with superposition states field are studied.When the field is superposition state of |0〉 and |1〉,the results obtained using the numerical method indicate that the entropic squeezing properties of the field is closely related to the superposition coefficient φ and is influenced by the superposition coefficient.When φ is larger than 0 and smaller than π/2,with the increasing of the value of φ,the entropic squeezing properties of the field is getting stronger.