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Journal of Atomic and Molecular Physics

Light squeezing in the system of squeezed vacuum field interacting with the V-type three-level atom via intensity-dependent coupling without rotating wave approximation

M. Zhou

Published Jan 1, 2007• 0 citations
OpenAlex

Abstract

The time evolution of light squeezing in the system of squeezed vacuum field interacting with V-type three-level atom via intensity-dependent coupling is studied by means of the quantum theory without rotating wave approximation.The result obtained by means of numerical method indicate that the light field is periodically squeezed,Moreover,the squeezing of light field is restrained and the quantum chaos caused by the virtual-photon process depend on the initial state parameters of the system:r,ω and g.When r increases,the inhibition of squeezing of light field by the virtual-photon process becomes stronger and then weaker.When ω and g increase,the quantum chaos gradually become weak or strong respectively.

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Acta Physica Sinica•Jan 1, 2001•1 citation
The time evolution of light squeezing in the system of squeezed vacuum field interacting with V-type three-level atom via intensity-dependent coupling is studied by means of the quantum theory without rotating wave approximation.The result obtained by means of numerical method indicate that the light field is periodically squeezed,Moreover,the squeezing of light field is restrained and the quantum chaos caused by the virtual-photon process depend on the initial state parameters of the system:r,ω and g.When r increases,the inhibition of squeezing of light field by the virtual-photon process becomes stronger and then weaker.When ω and g increase,the quantum chaos gradually become weak or strong respectively.
The time evolution of atomic dipole squeezing in the intensity-dependent coupling interaction between squeezing vacuum state and V-type three-level atom is studied using the quantum theory.The effects of the squeezing degree r of initial field and the coupling constant g are discussed by the method of the numerical calculations.The result shows that when r increases,the times of atomic dipole squeezing decrease gradually and vanish with the time evolution,but the maximum of degree has no evident change;the times of atomic dipole squeezing increase,while the duration is shortened with the increase of g.
The time evolution of Light squeezing in the system of single-mode field interacting with V-type three-level atom via intensity-dependent coupling in Kerr medium is studied by means of the quantum theory.The effects of the coupling constant χ and the initial average photon numbers on the squeezing are discussed by the method of the numerical calculations.The result shows that Kerr effect has decreased the atomic dipole squeezing in various degrees the Proper initial average photon numbers be propitious to the squeezing of light.
The time evolution of atomic dipole squeezing in the system of single-mode field interacting with V-type three-level atom via intensity-dependent coupling in Kerr medium is studied by means of the quantum theory.The effects of the coupling constant χ and the detuning Ω on the dipole squeezing are discussed by the method of the numerical calculations.The results show that Kerr effect has decreased the atomic dipole squeezing in various degrees and proper detuning Ω is propitious to atomic dipole squeezing.
The statistic properties of photons in a system of two-mode squeezed vacuum field interacting with a two-level atom are studied without the rotating-wave approximation by means of quantum theory, and the influence of the virtual-photon process on the statistic properties of photons is discussed emphatically. The results obtained using a numerical method indicate that the influence of the virtual-photon process on the statistic properties of photons qives rise to quantum chaos, that is related to the initial state parameters of the system.