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Chinese Journal of Quantum Electronics

Atomic dipole squeezing in the system of the two-mode entangled coherent states interacting with a V-type three-level atom in Kerr medium

Cao Zhuo

Published Jan 1, 2006• 0 citations
OpenAlex

Abstract

Atomic dipole squeezing effects in the system of the two-mode entangled coherent states interacting with a V-type three-level atom in Kerr medium has been discussed. The results indicate that the atomic dipole squeezing effects depend on the degree of entanglement of the two-mode entangled coherent states, the coupling strength of the Kerr medium with the field, the detuning and the atomic initial state.

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Chinese Journal of Quantum Electronics•Jan 1, 2004•0 citations
Atomic dipole squeezing effects in the system of the two-mode entangled coherent states interacting with a V-type three-level atom in Kerr medium has been discussed. The results indicate that the atomic dipole squeezing effects depend on the degree of entanglement of the two-mode entangled coherent states, the coupling strength of the Kerr medium with the field, the detuning and the atomic initial state.
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.
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 amplitude-squared squeezing effects of a Ξ-type three-level atom interacting with two-mode entangled coherent states are investigated.The effects of the degree of entanglement of the two-mode entangled coherent states,the ground state probability amplitude of the atomic initial state,the detuning,the mean photon number and the atom-field coupling constant on the atomic dipole amplitude-squared squeezing are analyzed.The results indicate that the light squeezing effects depend on the degree of entanglement of the two-mode entangled coherent optical fields,the detuning,the mean photon numbers,the atom-field coupling constant and the atomic initial state.
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 .