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Acta Sinica Quantum Optica

Quantum Correlation Properties of Light Interacting with Bose-Einstein Condensate of Atoms

Huang Chun-Jia

Published Jan 1, 2005• 0 citations
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Abstract

The quantum correlation properties of light interacting with Bose-Einstein Condensate of two-level atoms are studied. The results show that the quantum correlation properties of light keep invariant in the process of interaction between light and atomic BEC, which is determined by initial light field.

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The Hamiltonian operator of two-mode light field interacting with Bose-Einstein condensate(BEC) of two-level atoms is improved in terms of the lattice-liquid model,and the squeezing properties of two-mode squeezed field interacting with Bose-Einstein condensate of two-level atoms are studied.The results show that two quadrature components of light can be squeezed periodically,the maximum depth of squeezing is closely correlated to the initial squeezing parameter of light,and the duration is determined by the frequency of the light field.
Aim The purpose of this paper is to study the quantum properties of two-mode light fields interacting with Bose-Einstein condensate.Methods Bogoliubov's method is used to resolve the dynamic equations of the system.Results During the course of the interaction between two-mode light field and Bose-Einstein condensate,the two quadrature components of the light fields can be squeezed periodically,the photons produce bunching effect.Conclusion The correlation between the two modes always shows the non-classical correlation in the process of interaction between light fields and Bose-Einstein condensate.
The quantum correlation properties and squeezing properties of atomic laser are studied in the system of the binomial states field interacting with Bcse-Einstein condensate of two-level atoms,and the amplitude-squared squeezing effects of atomic laser are also discussed.The influence of field parameter and atom parameter on the depth and duration of squeezing are mainly investigated by solving the Heisenberg equation based on the entire quantum theory.The results show that the quantum correlation properties of atomic laser keep invariant in the process of interaction between light and atomic BEC.The two quadrature components of atomic laser evolve periodically with t(?)me and can be squeezed.The depth of squeezing is determined by the binomial states field.The duration of squeezing depends on the coupling constant between light field and atoms.The relations and differences are briefly discussed between the squeezing effects and amplitude-squared squeezing effects.
The quantum properties and amplitude-squared squeezing effects of light field are studied in the system of two-mode SU(1,1) coherent states interacting with Bose-Einstein Condensate of V-type three-level atoms,and the squeezing properties of atomic laser have also been discussed.The results show that the quantum correlation properties of light field keep invariant in the process of interaction between light field and atomic BEC,and the photons of each mode produce antibunching effect.The correlation between the two modes shows the non-classical correlation in the process of interaction.There are amplitude-squared squeezing effects in these quantum states.The influence of field parameter and atom parameter on the depth and duration of squeezing are investigated.The two-mode atomic laser can be squeezed,but it is difficult to squeeze.The degree of squeezing is determined by initial light field.