摘要
运用量子熵理论,探讨了Λ型三能级原子与Pólya态光场相互作用时,光场分布参数、原子相对失谐量、最大光子数、光场概率参数和原子初态对系统量子纠缠特性的影响。结果表明:当Λ型三能级原子与Pólya态光场相互作用时,若初态为两能级等权叠加态,各参量取适当值时可得到最大纠缠度较小的、稳定的、周期性振荡的量子纠缠态,若初态为激发态或三能级等权叠加态,各参量取适当值时可得到最大纠缠度为1.1的、稳定的、周期性振荡的纠缠态。
The influences of light-field distribution parameters,atomic relative detuning,maximum photon number,light-field probability parameters,and initial atomic states on quantum entanglement characteristics of a system comprising a Pólya-state light field interacting with aΛ-type three-level atom are analyzed based on the quantum entropy theory.The results denote that when theΛ-type three-level atom interacts with the Pólya-state light field and the initial state is a two-lower-level energy-equal superposition state,a stable and periodically oscillating entangled state with a relatively small maximum entanglement degree can be obtained for appropriate parameter values.However,if the initial state is an excited state or a three-level equal-weight superposition state,a stable and periodically oscillating entangled state with a maximum entanglement degree of 1.1 can be obtained for appropriate parameter values.
作者
罗瑞桓
萨楚尔夫
Luo Ruihuan;Sachuerfu(College of Physics and Electronic Information,Inner Mongolia Normal University,Hohhot,Inner Mongolia 010022,China;Library,Inner Mongolia Normal University,Hohhot,Inner Mongolia 010022,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2019年第23期260-267,共8页
Laser & Optoelectronics Progress
基金
内蒙古自治区自然科学基金(2013MS0115)
内蒙古师范大学“十百千”人才基金(RCPY-2-2012-K-038)
关键词
量子光学
量子通信
Pólya态
量子纠缠特性
Λ型三能级原子
quantum optics
quantum communications
Pólya state
quantum entanglement characteristics
Λ-type three-level atom
