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Journal of Jianghan University

Light Squeezing of the Non－resonant Interaction System Between Two－atomes and Field in Dissipative Cavity

Zhang Li-Hui, Shi Wenxing

Published Oct 20, 2012• 0 citations
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Light Squeezing of the Non-resonant Interaction System Between Two-atomes and Field in Dissipative Cavity

Shi Wenxing

By means of numerical calculations,the squeezing property of the light field in the non-resonant system of two entangled atoms interacting with coherent field in dissipative cavity is studied.The effects of the detuning between the atom and cavity field,the initial field intensity,the decay of the cavity field on the light squeezing are discussed.The results show that when two entangled atoms interact with coherent field in the non-resonat system,light squeezing may occur,the squeezing degree has the periodicity with the time evolution.Also,the squeezing degree of light field becomes strong,the squeezing time increases,when the initial field intensity is adjusted appropriately.With the increase of the decay of the cavity field,the squeezing degree of light field gradually becomes weak,the squeezing time gradually decreases.

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By means of numerical calculations,the squeezing property of the light field in the non-resonant system of two entangled atoms interacting with coherent field in dissipative cavity is studied.The effects of the detuning between the atom and cavity field,the initial field intensity,the decay of the cavity field on the light squeezing are discussed.The results show that when two entangled atoms interact with coherent field in the non-resonat system,light squeezing may occur,the squeezing degree has the periodicity with the time evolution.Also,the squeezing degree of light field becomes strong,the squeezing time increases,when the initial field intensity is adjusted appropriately.With the increase of the decay of the cavity field,the squeezing degree of light field gradually becomes weak,the squeezing time gradually decreases.
The field squeezing and the atomic dipole squeezing of a two-level atom in a dissipative cavity initially in vacuum are investigated.By means of exact solution of the master equation,the matrix elements of the density operator of the compound atom-field system are obtained.It is found that the cavity dissipation has an obvious influence on the atomic squeezing and the field squeezing under the resonant atom-field interaction.But the effects of the cavity dissipation on both squeezing will decrease under the off-resonance interaction condition.
Based on the time-convolutionless master-equation approach, we investigate squeezing of light field in a dissipative Jaynes–Cummings model. The results show that squeezing light can be generated when the atom transits to a ground state from an excited state, and then a collapse-revival phenomenon will occur in the squeezing of light field due to atom-cavity coupling. Enhancing the atom-cavity coupling can increase the frequency of the collapse-revival of squeezing. The stronger the non-Markovian effect is, the more obvious the collapse-revival phenomenon is. The oscillatory frequency of the squeezing is dependent on the resonant frequency of the atom-cavity.