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Acta Physica Sinica

INTERACTION OF TWO-MODE SU（1，1） COHERENT STATES WITH THE V-TYPE THREE-LEVEL ATOM IN A KERR-LIKE-MEDIUM

LAI YUN-ZHONG, Liang Jiu-Qing, (1)山西大学理论物理研究所; (2)太原重型机械学院基础部

Published Jan 1, 1997• 2 citations
Publisher

Abstract

We first derive the state vector of a V-type three-level atom interacting with two-mode SU (1,1) coherent states in a Kerr-like medium. It is shown by numericl calculations that the Kerr effect results indifferent characters of the Rabi oscillation, as compared with the two-levelatom case, while the correlation of the two-mode coherent states is less affected by the the Kerr medium. We also discuss the influence of Kerr effect on the Cauchy-Schwartz inequality.

DOI
10.7498/aps.46.1710

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We first derive the state vector of a V-type three-level atom interacting with two-mode SU (1,1) coherent states in a Kerr-like medium. It is shown by numericl calculations that the Kerr effect results indifferent characters of the Rabi oscillation, as compared with the two-levelatom case, while the correlation of the two-mode coherent states is less affected by the the Kerr medium. We also discuss the influence of Kerr effect on the Cauchy-Schwartz inequality.
The state function of the two-mode SU(1,1) coherent states field interacting with four-level atom added Kerr-like medium was derived. By using the state function it was studied that the influence of the Kerr effect and the initial light field intensity on the two-mode intensity correlation function, the Cauchy-Schwartz inequality, and the second-order correlation function for each mode. The results indicate that the influences of Kerr effects on the properties of the correlation on the correlation intensity between the two-mode on the bunching or antibunching effect of the two-mode SU(1,1) coherent states are obviously related to the initial intensity of the light field.
In the system of SU(1,1) coherent states interacting non-resonantly with a Λ-type three-level atom, the influences of detuning, Kerr medium and initial atomic state on the second-order coherence degree are investigated. The results show that the influence of Kerr medium is unobvious on the second-order coherence degree, that the detuning makes the influence of initial atomic state on the mode 1 weak and on the mode 2 strong, and that the initial atomic state effects on the second-order coherence degree for each mode, but the effects on the mode 1 are stronger than on the mode 2.