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Chinese Journal of Quantum Electronics

Dipole squeezing in the interaction of a ∧-type three-level atom with a strong coherent field in a high-Q Kerr cavity

Yu Wan‐Lun

Published Jan 1, 2004• 0 citations
OpenAlex

Abstract

The dipole squeezing of a A-type three-level atom interacting with a strong coherent field in a high-Q Kerr cavity is investigated. The effects of the Kerr medium, the field-atom coupling coefficient and the detuning on the atomic dipole squeezing are discussed by numerical calculation.

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Dipole squeezing in the system of the two-mode entangled coherent field interacting with atoms in Bell states in Kerr medium

Lin Ji-Cheng, Zheng Xiao-hu, Zhuo‐Liang Cao +1 more

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Acta Physica Sinica•Jan 1, 2007•5 citations
The dipole squeezing effects of a A-type three-level atom interacting with a two-mode coherent field are investigated. Through the numerical calculations, the influences of the Kerr effect and the one-photon frequency detuning on the atomic dipole squeezing are also discussed. It is shown that the atomic dipole squeezing reduces up to disappearence and that the time of the squeezing becomes short with increasing the Kerr effect, but that the atomic dipole squeezing raises and that the time of the squeezing becomes long with increasing the one-photon frequency detuning .
The time evolution of atomic dipole squeezing in the system of single-mode field interacting with V-type three-level atom via intensity-dependent coupling in Kerr medium is studied by means of the quantum theory.The effects of the coupling constant χ and the detuning Ω on the dipole squeezing are discussed by the method of the numerical calculations.The results show that Kerr effect has decreased the atomic dipole squeezing in various degrees and proper detuning Ω is propitious to atomic dipole squeezing.
The atomic dipole squeezing effect in the system of two identical two-level atoms in the Bell state interacting with the two-mode entangled coherent state field in Kerr medium are investigated by means of solving the Schrdinger equation and numerical calculations. The effects on the atomic dipole squeezing effect produced by the atomic initial state, mean photon number of light field, the degree of the entanglement of the entangled coherent field, the coupling strength of the Kerr medium with the light field and the coupling strength of dipole-dipole interaction between atoms are discussed. The results show that the dipole squeezing effect does not appear for the Bell state |β11>, while there can be dipole squeezing effect under certain conditions for the Bell states |β00> or |β01> or |β10>. In the latter case, the dipole squeezing effect depends on the coupling strength of the Kerr medium with the light field, the mean photon number and the degree of entanglement of the two-mode entangled coherent field.