多光子T-C模型中原子布居数的演化  

Time-evolution of the Atom's Occupancy in Multiphoton Tavis-Cummings Model

作　　者：邱昌东[1] 卢道明[1] 

机构地区：[1]武夷学院电子工程系

出　　处：《云南师范大学学报（自然科学版）》2010年第4期55-59,共5页Journal of Yunnan Normal University:Natural Sciences Edition

基　　金：福建省自然科学基金资助项目(2008J0217);福建省教育厅科技项目(JK2009049)

摘　　要：利用Tavis-Cummings模型研究了耦合二能级原子通过多光子跃迁与相干态光场相互作用系统中原子布居数的演化,讨论了原子间耦合强度、纠缠度和光场初始平均光子数的变化对原子布居数的演化的影响。数值计算结果表明:原子布居差随时间演化曲线的行为主要由光场初始平均光子数的大小决定;原子间耦合强度的变化对其演化的影响可忽略;原子间纠缠程度的增大会减弱原子的反转。Using Tavis - Cummings model, the evolution of the atom＇ s occupancy in interaction of two coupling two - level atoms with the single mode coherent field through multiphoton transition is studied. The influences of coupling coefficient between atoms ,the initial mean photon number of field and the degree of entanglement of two atoms on the evolution of the atom＇ s occupancy are discussed. The results obtained by numerical calculations show that the initial mean photon number of field influences violently the evolution properties of the atom＇ s occupancy, the influence of coupling coefficient between atoms may be neglected , and the degree of entanglement of two atoms influences the reverse of atoms.

关 键 词：量子光学 多光子 相干态 原子布居差 

分 类 号：O431.2[机械工程—光学工程]