| 消除热库中量子位的消相干性 |
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| 引用本文： | 唐志祥,张登玉. 消除热库中量子位的消相干性[J]. 原子与分子物理学报, 2004, 21(1): 89-95 |
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| 作者姓名： | 唐志祥 张登玉 |
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| 作者单位： | 1. 衡阳师范学院物理系,衡阳,421008;湘潭大学现代物理研究所,湘潭,411105
2. 衡阳师范学院物理系,衡阳,421008 |
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| 基金项目： | 湖南省科技厅中青年科技基金(00JZY2136);湖南省自然科学基金(02JJY209)的资助课题. |
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| 摘 要： | 以二能级原子作为量子位,利用求解相互作用系统约化密度矩阵非对角元的方法,分别研究热库中量子位模型和依赖强度耦合Jaynes-Cummings模型的消相干特性.当外加驱动场消除消相干时,得到两种模型下驱动场必须满足的约束方程.?
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| 关 键 词： | 量子位 依赖强度耦合Jaynes-Cummings模型 约化密度矩阵 消相干 |
| 文章编号： | 1000-0364(2004)01-0089-07 |
| 收稿时间： | 2003-10-09 |
The elimination of the quantum bit''s decoherence in a thermal reservoir |
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| TANG Zhi-xiang. The elimination of the quantum bit''s decoherence in a thermal reservoir[J]. Journal of Atomic and Molecular Physics, 2004, 21(1): 89-95 |
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| Authors: | TANG Zhi-xiang |
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| Affiliation: | TANG Zhi-xiang~ |
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| Abstract: | Using a two-level atom as a quantum bit, We have studied the decoherent properties of the single quantum bit model in a thermal reservoir and the intensity dependent coupling Jaynes-Cummings model by calculating the non-oposite angle elements of the reduced density matrix of the intraction system,respectively. We also work out the restriction equation that must be satisfied by the external controllable driving field when the decoherence is to be eliminated. |
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| Keywords: | Quantum bit Intensity dependent coupling Jaynes-Cummings model Reduced density matrix Decoherence |
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