存在内禀退相干时二项式光场中原子的布居数反转  

The Atomic Population Inversion in the System of Binomial Optical Field Interacting with a Two-level Atom Under intrinsic Decoherece Condition

作　　者：崔英华[1] 萨楚尔夫[1] 宫艳丽[1] 

机构地区：[1]内蒙古师范大学物理与电子信息学院,内蒙古呼和浩特010022

出　　处：《量子光学学报》2008年第4期379-383,共5页Journal of Quantum Optics

基　　金：国家自然科学基金(60467002);内蒙古自治区自然科学基金(200408020107);内蒙古高校科研基金(NJ03038)

摘　　要：在Milburn内禀退相干模型下,研究了二项式光场与二能级原子相互作用系统中原子的布居数反转,分析了内禀退相干,二项式光场系数和场的最大光子数对原子布居数反转的影响。结果表明,存在内禀退相干时,原子布居数反转出现明显的崩塌-回复现象,随着时间的演化,Rabi振荡的包络值将很快的崩塌到零,并且随着内禀退相干因子的减小,衰减加剧;当内禀退相干因子不变时,二项式光场从相干态过渡到中间态,以及由中间态到数态过程中,原子布居数反转出现明显的崩塌-回复现象,而且Rabi振荡的频率会明显加快;当二项式光场的最大光子数增大时,原子布居差的崩塌-回复现象就会逐渐消失。With the consideration of Milburn model of intrinsic decoherece, the atomic population inversion in the system of the binomial optical field interacting with a two-level atom is inverstigated. The influences of instrinsic decoherece, the parameters η of the binomial optical field and photon number on the atomic population inversion are discussed. The result show that the phenomena of collapse and revival will also appear with the intrinsic decoherece. The amplitude of the Rabi oscillation will be reduced to zero with the evolution of being time. The decay process is at faster rate with the values of the parameters of the instrinsic decoherece smaller. When the binomial optical state changes from a coherent state to a middle state then to a Fock state, the phenomena of collapse and revival can also occur. The Rabi oscillation frequency of the atomic population increases apparently. The phenomena of collapse and revival disappear as photon number increases.

关 键 词：量子光学 二项式态 Milburn理论 布居数反转 

分 类 号：O431[机械工程—光学工程]