多光子过程中的量子保真度  

Evolution of the Fidelity in the Multiphoton Process

作　　者：李同锴[1] 张彦立[1] 申俊杰[1] 乔治[1] 崔建坡[1] 何正红[2] 

机构地区：[1]石家庄铁道学院数理系,河北石家庄050043 [2]西南师范大学物理学院,重庆400715

出　　处：《河北大学学报（自然科学版）》2008年第4期365-368,共4页Journal of Hebei University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(10074013)

摘　　要：运用全量子理论,研究了真空场多光子Jaynes-Cummings模型中场和二能级原子相互作用的保真度,发现原子初始处于基态的几率和失谐量影响保真度.结果表明:原子初始处于基态的几率越大,保真度越大;失谐量越小,保真度就越小.The properties of the evolution of the fidelities under the interaction of vacuum state for radiation field with two-level atom in the multiphoton process have been investigated. The influences of probability atom being in ground state initially and detuning on the fidelity have been discussed. The numerical results show that the higher the probability of atom being in ground state initially is, the higher the fidelities are; the lower detuning value is, the lower the fidelities are.

关 键 词：保真度 多光子JAYNES-CUMMINGS模型 两能级原子 

分 类 号：O431.2[机械工程—光学工程]