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Journal of Jianghan University

Two-mode Field Squeezing of SU (2) Coherent States Interacting with Two Coupled Atoms

Lihui Zhang

Published Jan 1, 2002• 0 citations
OpenAlex

Abstract

The two-mode field squeezing in the system of SU (2) coherent states interacting with two coupling-atoms are studied. Influences of the total photon number, the partition parameter and the dipole-dipole interaction on the field squeezing are discussed in the paper.

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Difference squeezing properties of the field in the system of a two-mode field initially in an SU (2) coherent state resonantly interacting with a three-level V-type atom are investigated by means of the quantum theory and numerical calculations. The dependence of the difference squeezing of two-mode on the total photon of the tow-mode, the partition parameter, the coupling constant and the atomic initial state is discussed for three cases: (1) no state-selective atomic measurement; (2) direct state-selective atomic measurement; (3) state-selective atomic measurement after the application of a classical field. The results indicate that when the atom is initially on the lower level or the total photon number of the two-mode is increased, the average intensity of the difference squeezing is distinctly enhanced; when the partition parameter is decreased, the average intensity of the difference squeezing is distinctly deadened; when the tow coupling constants are same and the state-selective measurement is performed on the atom, the average intensity of the difference squeezing does not change over time.