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Journal of Dezhou University

The atomic dipole higher-order squeezing of a three-level atom

Liu Yong-liang

Published Jan 1, 2003• 0 citations
OpenAlex

Abstract

This paper studied the atomic dipole higher-order squeezing in the system of a three-level atom interacting with a single mode radiation vacuum field. Numerical method is adopted to discuss atomic initial coherence on the atomic dipole higher-order squeezing effect.

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This paper studied the atomic dipole amplitude squared squeezing in the system of a three level atom interacting with a single mode radiation vacuum field. Numerical method is adopted to discuss the influence of the relative value of atom field coupling constants and the atomic initial coherence on the squeezing effect. It is found that no squeezing is produced in the process of interaction if the atom is initially most excited or in its ground state. However, if the atom is initially in a coherent superposition state of the ground state and the most excited state, there will be dipole amplitude squared squeezing effect in the process of interaction; the squeezing degree depends on the phase factor relating to atomic initial coherence; when other conditions are fixed, the atom will produced optimum squeezing effect if the probability of atom initially in the most excited state is 1/4 and the probability of it initially in the ground state is 3/4. If none of the atom field coupling constants are zero, the quantities of squeezing vary periodically; the change period of the quantities of squeezing depends on the relative value of two atom field coupling constants.
By means of the time-evolution operator method,the evolution of state vector in the system of a two-level atom interacting with k-mode radiation field is given.Using numerical calculation,atomic dipole squeezing in interaction of two-level atom with three-mode coherent state light field is studied.The influences the initial phase angle and intensity of initial coherent field on the atomic dipole squeezing are discussed.The results indicate that the atomic dipole squeezing has intermittence squeezing.