河北师范大学学报—

期刊信息

刊名：河北师范大学学报（自然科学版）Journal of Hebei Normal University (Natural Science)
主办：河北师范大学
ISSN： 1000-5854
CN： 13-1061/N
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薛定谔猫态光场与多光子跃迁运动二能级原子相互作用系统的保真度

王艳清¹

萨楚尔夫^1,2

王亚男¹

1. 内蒙古师范大学物理与电子信息学院, 内蒙古呼和浩特 010022;
2. 内蒙古师范大学图书馆, 内蒙古呼和浩特 010022
DOI： 10.13763/j.cnki.jhebnu.nse.2015.01.006

Fidelity of Quantum State in a System of a Moving Two-level Atom for Multi-photon Transition Interacting with Schrödinger Cat State Light Field

WANG Yanqing¹, Sachuerfu^1,2, WANG Yanan¹

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摘要/Abstract

摘要：

利用全量子理论,研究了薛定谔猫态光场与多光子跃迁运动二能级原子相互作用系统的保真度.分别讨论了初始光强、原子运动速度、跃迁光子数以及薛定谔猫态中两宏观相干态的相位角等物理参量对系统保真度的影响.结果表明:随着初始光强的增大,量子态保真效果越来越差;当初始光强增大到一定程度时,偶相干态和奇相干态的保真度与时间演化特性相同;当跃迁光子数为奇数时,原子运动速度的增大使量子态保真效果更好.

Abstract：

The fidelity evolution in a system which is composed of a multi-photon transition moving two-level atom interacting with the Schrödinger cat state lighe field is studied by means of the full quantum theory.The influences of the strength of light field,the phase angle between the two coherent states,the atomic motion and the number of transition photon on the fidelity in a system are discussed.The results show that with increasing in the strength of light,the value of the fidelity is decreased.When the strength of light field is large enough,the fidelity of even coherent state and odd coherent state becomes equal,and the properties of fidelity evolvement are also the same.When the transitional photon number is odd,the fidelity of quantum state will be better with increasing in the velocity of atomic motion.

关键词

关键词： 量子光学 ; 量子态保真度 ; 薛定谔猫态光场 ; 二能级原子 ; 多光子跃迁

Key words： quantum optics ; quantum state fidelity ; Schrö ; dinger cat state lighe field ; two-level atom ; multi-photon transition

参考文献 8

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