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Journal of Jilin University

Quantum properties of light field of two identical two-level entangled atoms interacting with radiation fields in binomial states

Song Jun, Zhuo‐Liang Cao

Published Jan 1, 2004• 0 citations
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Abstract

In this article, the quantum properties of light field of the two identical two-level entangled atoms interacting with the binomial optical field were studied by means of time evolution operator and numerical calculations. The results show that the time evolution of the squeezing and coherence properties of the light field depends on the entanglement degree of the initial two identical two-level entangled atoms and the parameters of the binomial optical field. The optical field fluctuation can be completely squeezed via choosing appropriate parameters.

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Chinese journal of atomic and molecular physics•Jan 1, 2004•0 citations
In this article, the quantum properties of light field of the two identical two-level entangled atoms interacting with the binomial optical field were studied by means of time evolution operator and numerical calculations. The results show that the time evolution of the squeezing and coherence properties of the light field depends on the entanglement degree of the initial two identical two-level entangled atoms and the parameters of the binomial optical field. The optical field fluctuation can be completely squeezed via choosing appropriate parameters.
In this article, the dynamical properties in the system of two identical twolevel entangled atoms interacting with a binomial optical field are studied by means of time evolution operator and numerical calculations. The results show that the time evolution of atomic population and atomic dipole squeezing depends on the degree of entanglement of the initial two identical twolevel entangled atoms and the parameters of the binomial state optical field. The atomic dipole moment can be completely squeezed via choosing appropriate parameters of the system.
In this article,the squeezing properties of light in the system of two identical two-level entangled atoms Raman interacting with the coherent optical field are studied.The results obtained by numerical method show that light squeezing effects depend on the mean photon numbers of the coherent optical field and the degree of entanglement of the initial two identical two-level entangled atoms,with the increasing of the degree of entanglement of the initial two entangled atoms,the average value of the fluctuation of two quadrature components of light decreases and the squeezing time is prolonged.
The quantum properties of the light field in the system of thermal radiation field interacting with two identical entangled atoms are studied by means of time evolution operator and numerical calculations.The results show that the entanglement degree of the initial two identical two-level entangled atoms and the intensity of the thermal radiation field have influence on the quantum properties of light field.For the initial light field with appropriate intensity,the non-classical properties of the light field will appear.The non-classical properties are increased by the growth of the intensity of the initial thermal radiation field,but the influence of the entanglement degree on the non-classical properties is complex.
In this article,the time evolution properties of the field entropy in the system of the two identical two-level entangled atoms interacting with the single-mode coherent light field are studied by means of full quantum theory.The influences of the initial states and the degree of entanglement of two identical two-level entangled atoms and the intensity of the light field on the field entropy are discussed by numerical calculations.The results show that the average value and the oscillation frequency of the field entropy increases with the increasing of the mean photon number,the oscillation of the field entropy presents stated periods in the weak light field and presents collapses and revivals in the increased light field,the amplitudes of field entropy increase with increasing initial degree of entanglement of two entangled atoms.