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Journal of Atomic and Molecular Physics

Light squeezing in the intensity-dependent coupling interaction between light field and the V-type three-level atom without rotating wave approximation

Xiu Li

Published Jan 1, 2009• 0 citations
OpenAlex

Abstract

The time evolution of light squeezing in the intensity-dependent coupling interaction between light field with V-type three-level atom is studied by means of the quantum theory without rotating wave approximation. The result indicate that the light squeezing relates to the properties of the system, Moreover , the squeezing of light is strengthened and the quantum chaos caused by the virtual-photon process depend on the initial state parameters of the system:、ω and g.

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Acta Physica Sinica•Jan 1, 2009•3 citations
The time evolution of light squeezing in the intensity-dependent coupling interaction between light field with V-type three-level atom is studied by means of the quantum theory without rotating wave approximation. The result indicate that the light squeezing relates to the properties of the system, Moreover , the squeezing of light is strengthened and the quantum chaos caused by the virtual-photon process depend on the initial state parameters of the system:、ω and g.
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 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 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 squeezing properties of atom laser are investigated with and without rotating-wave approximation by means of quantum theory in the system of optical field interacting with Bose-Einstein condensate of two-level atoms. The influences of the atomic eigenfrequency, the interaction intensity between optical field and atoms，the initial squeezing factor of optical field and the virtual photon field on the squeezing properties are discussed. The results show that two quadrature components of atom laser can be squeezed periodically. The quantum Rabi frequency and the collapse and revival frequency of atom laser fluctuation depend on the atomic eigenfrequency and the interaction intensity between optical field and atoms respectively. When the initial squeezing factor of optical field increases and the virtual photon field is considered, the degree of squeezing of the atom laser also increases.