Kerr效应对依赖强度耦合J-C模型中纠缠交换的影响  

Influence of Kerr effect on entanglement transfer in the Jaynes-Cummings model via intensity-dependent coupling

作　　者：王菊霞[1,2] 杨志勇[1] 安毓英(指导)[1] 

机构地区：[1]西安电子科技大学技术物理学院,陕西西安710071 [2]渭南师范学院物理与电子工程系,量子光学与光子学研究所,陕西渭南714000

出　　处：《量子电子学报》2009年第1期81-85,共5页Chinese Journal of Quantum Electronics

基　　金：陕西省自然科学基金项目(SJ08A25);陕西省教育厅专项科研基金项目(08JK286);渭南师院重点科研基金项目(08YKF014)

摘　　要：在多个原子分别与多个腔场发生依赖强度耦合的相互作用系统中,运用全量子理论,研究了Kerr介质对纠缠信息在原子与腔场之间周期性可逆交换传递过程的影响。结果表明:Kerr介质对初始腔场为真空态或最低Fock态组成的纠缠态等一些特殊情形不产生任何影响。而对一般Fock态|n_k〉(n_k≠0)都会改变其纠缠信息转换的相位和周期。Kerr效应越强烈转换周期就越短,相反,可以利用选取不同Kerr介质来控制纠缠信息交换传递的快慢。另外,相位的改变也与腔场中光子数n_k(k=1,2,3,…,M)有关。In the system of many atoms interacting with many cavity fields respectively via intensity- dependent coupling, the influence of Kerr medium on process of entangled information periodic transfer between the atoms and the cavity fields is studied by means of the complete quantum theory. It is found that Kerr medium does not influence on special cases which the initial cavity fields are vacuum states or entangled states superposing of the lowest Fock states, but the phase and period of entanglement information transfer are changed obviously for the general Fock states [nk〉 （nk ≠ 0） in the presence of Kerr effect. The stronger the Kerr effect, the shorter the transfer period. The Speed of the entangled information transfer can be controlled by choosing different Kerr medium. In the other hand, the alteration of the transfer phase has also close relation with the photon number nk （k = 1, 2, 3, …, M） in the cavity fields.

关 键 词：量子光学 纠缠交换 全量子理论 KERR效应 非线性J-C模型 

分 类 号：O431.2[机械工程—光学工程]