多光子跃迁下二能级原子与NPS态光场相互作用系统的纠缠特性

J4 ›› 2017, Vol. 34 ›› Issue (2): 190-195.

多光子跃迁下二能级原子与NPS态光场相互作用系统的纠缠特性

郭彩丽¹,萨楚尔夫¹,李斌²

1. 内蒙古师范大学物理与电子信息学院
2. 内蒙古师范大学

收稿日期:2016-01-25 修回日期:2016-04-21 出版日期:2017-03-28 发布日期:2017-04-06
通讯作者: 郭彩丽

Quantum Entanglement in a System of a Two-level Atom for Multi-Photon Transition Interacting with Intermediate Number-Phase State Light

Received:2016-01-25 Revised:2016-04-21 Published:2017-03-28 Online:2017-04-06

摘要/Abstract

摘要： 摘要：利用全量子理论，研究了NPS态光场与二能级原子相互作用系统的纠缠度。计算了系统纠缠度表达式，分析了原子初态、光场相位参数、最大光子数、光场参数和跃迁光子数对系统纠缠特性的影响。结果表明：原子初态处在纠缠态，并且光场相位参数较小时，系统的纠缠度较大；当选取合适的最大光子数和跃迁光子数时，光场参数取得越小，系统纠缠现象就越明显。

关键词: 关键词：量子信息, NPS态光场, 纠缠度, 二能级原子, Key words: quantum optics, intermediate number-phase state of light field, entanglement degree, Two-level atom

Abstract: Abstract: The quantum entanglement characteristic in a system composed of a multi-photon transition two-level atom interacting with an intermediate Number-Phase state is studied by means of the fully quantum theory. The influences of the atomic initial state, the parameter of field phase, the largest number of photon, the parameter of light field and the values of the transitional photon number on the entanglement degree of the system are analyzed. The results show that with the atomic initial state is entanglement state and the parameter of field phase is smaller, the entanglement degree in the system is increased obviously.; choosing appropriate values of the largest number of photon and the transition photon number, and decreasing the value of the parameter of light field, the entanglement phenomenon in the system is more obviously.

中图分类号:

中图分类号：O431.2

郭彩丽萨楚尔夫李斌. 多光子跃迁下二能级原子与NPS态光场相互作用系统的纠缠特性[J]. J4, 2017, 34(2): 190-195.

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