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Acta Physica Sinica

ADIABATIC TRANSITION TRANSFER PHENOMENON OF ELECTRONS AND THE QUANTUM STATISTICAL PROPERTIES OF LIGHT FIELD IN A KERR MEDIUM

LAI YUN-ZHONG, Weidong Li, Liang Jiu-Qing, (1)山西大学物理系，太原 030006; (2)太原重型机械学院基础部，太原 030024

Published Jan 1, 1998• 0 citations
Publisher

Abstract

We first derive the state vector of a cascade three-level atom interacting with pair coherent states in a kerr medium.It is shown by numerical calculations that the Kerr effect results in the adiabatic transition transfer phenomenon of electrons,and the superstructures in the long-time behavior of the quantum statistical properties of light field appear.

DOI
10.7498/aps.47.1489

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We first derive the state vector of a cascade three-level atom interacting with pair coherent states in a kerr medium.It is shown by numerical calculations that the Kerr effect results in the adiabatic transition transfer phenomenon of electrons,and the superstructures in the long-time behavior of the quantum statistical properties of light field appear.
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In this paper, the quantum properties of light in a system of two coupling atoms interacting with a single-model squeezed vacuum field at the two-photon transition in Kerr medium are studied by means of quantum theory.The influences of the Kerr medium and the dipole-dipole interaction between atoms are discussed. The results show that when the Kerr effect and the dipole-dipole interaction between atoms may be neglected, the fluctuation of U2 can be squeezed periodically. With increasing the Kerr effect and the dipole-dipole interaction between atoms, the squeezing effect of light gradually becomes weak and the squeezing time of light gradually decreases. The periodical collapse-revival phenomenon of the time evolution of the second-order coherence degree of the field appears, which is caused by the influence of the Kerr effect and the dipole-dipole interaction between atoms. No matter how large are the coupling constants, the photon bunching always appears.
Under the assumption that the input field is in the coherent state and the atom is prepared in the most excited state,the time evolution of the Mandel Q factor in a system consisting of a cascade atom embedded in a Kerr medium is investigated by using the full quantum mechanical scheme. It is found that Kerr effect has a great influence on the non-classical photon statistics in the case of large single-photon detuning in the system.Kerr effect suppresses non-classical photon statistics for the weak input coherent field and enhances it for the strong input coherent field.