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Cavity Field Spectra of a cascade three-level atom Interacting with a Single-Mode Field with Kerr-Like Medium

Communications in Theoretical Physics 2007年第1期47卷 131-134页

作者： GAO Yun-Feng FENG Jian ZHANG Gui-Ming College of Educational Technology and Massmedium Liaocheng University Liaocheng 252059 China Institute of Optical Communication Liaocheng University Liaocheng 252059 China

The cavity field spectrum of a cascade three-level atom interacting with single-mode field with Kerr-like medium in the cavity is investigated. The numerical results for the initial field in pure number state, coherent state and squeezed vacuum state are calculated, respectively. It is found that the Kerr-like medium affects the spectral structure even though the initial field is in vacuum when the atom is in upper level. In the case of strong input field, the number state spectrum shows two peaks with different heights; and the superposition state spectrum shows a multipeak structure with an equal distance of two neighboring peaks. The spectral ＂central frequency＂ shifts away from the resonant frequency with the increasing of average photon number.

关键词： cavity field spectrum Kerr-like medium cascade three-level atom

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Influence of atomic motion on the population and dipole squeezing of a cascade three-level atom in cavity field

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Chinese Physics B 2004年第8期13卷 1276-1282页

作者：朱爱东张寿 DepartmentofPhysics CollegeofScienceandEngineeringYanbianUniversityYanji133002China

The dynamical property of a cascade three-level atom is investigated in the condition of atomic motion. The influence of atomic motion on the population and dipole squeezing is discussed. The results show that atomic motion makes the amplitude of atomic population be steady and increasing the parameter ep which denotes the atomic motion and the structure of field mode can shorten the period of collapse-revivals. By choosing an appropriate paramenter ep, we can obtain a dipole squeezed atom of long standing.

关键词： atomic population dipole squeezing effect atomic motion cascade three-level atom

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Population Dynamics and Emission Spectrum of a cascade three-level Jaynes-Cummings Model with Intensity-Dependent Coupling in a Kerr-like Medium

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Communications in Theoretical Physics 2006年第4期45卷 727-731页

作者： ZHOU Qing-Chun Department of Mathematics and Physics Jiangsu University of Science and Technology Zhenjiang 212003 China

By using the method of eigenvectors, the atomic populations and emission spectrum are investigated in a system that consists of a cascade three-level atom resonantly interacting with a single-mode tield in a Kerr-like medium. The atom and the field are assumed to be initially in the upper atomic state and the Fock state, respectively. Results for models with intensity-dependent coupling and with intensity-independent coupling are compared. It is found that both population dynamics and emission spectrum show no indications of atom-field decoupling in the strong field limit if the intensity-dependent coupling is taken into account.

关键词： population emission spectrum cascade three-level atom Kerr-like medium

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