| 原子与双光场耦合系统量子信息保真度研究 |
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| 引用本文： | 胡冬梅,冉扬强,黄小春.原子与双光场耦合系统量子信息保真度研究[J].重庆工商大学学报(自然科学版),2007,24(2):144-147. |
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| 作者姓名： | 胡冬梅 冉扬强 黄小春 |
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| 作者单位： | 1. 西南大学,物理学院,重庆,北碚,400715
2. 重庆市第一中学校,重庆,400030 |
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| 基金项目： | 致谢：衷心感谢何正红老师的指导和帮助. |
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| 摘 要： | 讨论了在相位阻尼作用下，一个二能级原子与两个不同光场相互作用时系统的量子信息保真度随时间演化的过程，并对一个任意纯态量子比特通过光场与二能级原子耦合系统进行量子传输的保真度进行了研究，分析了系统作为传输信道对信息的支持程度（即系统的传真度）；着重讨论了相位阻尼和失谐对量子传输保真度的影响，并且获得了通过该信道进行传输的最大保真度。
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| 关 键 词： | 量子信息 保真度 相位阻尼 失谐参数 |
| 文章编号： | 1672-058X（2007）02-0144-04 |
| 收稿时间： | 2006-12-10 |
| 修稿时间： | 2006-12-102006-12-30 |
Research into fidelity of quantum information in atom's coupling to two optical fields system |
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| HU Dong-mei,RAN yang-qiang,HUANG Xiao-chun.Research into fidelity of quantum information in atom''s coupling to two optical fields system[J].Journal of Chongqing Technology and Business University:Natural Science Edition,2007,24(2):144-147. |
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| Authors: | HU Dong-mei RAN yang-qiang HUANG Xiao-chun |
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| Institution: | 1. Physics Department, Southwest University, Chongqing 400715, China; 2. Chongqing No. 1 Middle School, Chongqing 400030, China |
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| Abstract: | The real-time evolution process of quantum information fidelity of a system for an atom interac- ting with two distinct optical cavities under phase extenuation action is discussed.The fidelity of quantum trans- mission of a random passivity quantum bit's coulping with two-stage energy atom through optical field is stud- ied.The supporting effect of the system as the transmission channel on the information fidelity of the system is an- alyzed.The effect of the phase decoherence rate and detuning parameter on the fidelity is discussed.The maxi- mum fidelity of the transmission through the channel can be achieved. |
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| Keywords: | quantum information fidelity phase decoherence detuning parameter |
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