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Journal of Guizhou Normal University

Atomic dipole squeezing in the system of a two-level atom interaction with k-mode radiation field

Lu Dao

Published Jan 1, 2010• 0 citations
OpenAlex

Abstract

By means of the time-evolution operator method,the evolution of state vector in the system of a two-level atom interacting with k-mode radiation field is given.Using numerical calculation,atomic dipole squeezing in interaction of two-level atom with three-mode coherent state light field is studied.The influences the initial phase angle and intensity of initial coherent field on the atomic dipole squeezing are discussed.The results indicate that the atomic dipole squeezing has intermittence squeezing.

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Acta Sinica Quantum Optica•Jan 1, 2011•0 citations
By means of the time-evolution operator method,the evolution of state vector in the system of a two-level atom interacting with k-mode radiation field is given.Using numerical calculation,atomic dipole squeezing in interaction of two-level atom with three-mode coherent state light field is studied.The influences the initial phase angle and intensity of initial coherent field on the atomic dipole squeezing are discussed.The results indicate that the atomic dipole squeezing has intermittence 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.
By using the full quantum theory,the time evolution of atomic dipole squeezing parameters of a Λ-type three-level atom interacting with a single-mode coherent cavity field is investigated.The influence of the initial coherent-field intensity,the initial atomic coherence,the initial populations on the two lower atomic levels and their energy splitting on the atomic dipole squeezing are studied.Results show that the amount of dipole squeezing increases while the duration of dipole squeezing decreases with increasing initial field intensity.In the case of degenerate lower atomic states maximum dipole squeezing is reached when the two states have equal initial phases and equal populations.Exchange of initial populations in the lower atomic states does not influence time evolution of diploe squeezing.Atomic energy level splitting is helpful to dipole squeezing generation under certain conditions.
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.
In this article,the atomic dipole squeezing effects in the system of three identical two-level entangled atoms interacting with the coherent states field are investigated by mean of Schrdinger equation solution and numerical calculations.The results show that the time evolution of the atomic dipole squeezing parameters depends on the degree of entanglement of the entangled atoms and the intensity of the coherent field.The atomic dipole squeezing parameter decreases with the increasing of the degree of entanglement.
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.
Considering two Λ-type three-level atoms initially in the entangled state,one atom is poured into the cavity and interacts with a two-mode cavity.The dipole squeezing of an atom inside the cavity are investigated.The influences of the selective atomic measurement and the intensity of the coherent field which interacts with atom on dipole squeezing of an atom inside the cavity are discussed.The result obtained by numerical calculations shows that the dipole squeezing of an atom inside the cavity can be strengthened through selective atomic measurement for atom outside of the cavity.