| Decoherence Induced by Spin Chain Environment |
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| 作者姓名： | 王林成 崔海涛 衣学喜 |
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| 作者单位： | Department of Physics, Dalian University of Technology, Dalian 116024 |
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| 基金项目： | Supported by the Programme for New Century Excellent Talents in University of M0E of China, and the National Natural Science Foundation of China under Grant No 10305002 and 60578014. |
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| 摘 要： | We study the decoherence process of an exact solvable model that consists of a central spin-1/2 coupling to the surrounding anisotropy spin-1/2 chain in transverse fields. The Loschrnidt echo is calculated to study the character of decoherence with different degree of anisotropy. Our results show that the degree of anisotropy γ greatly affects the decoherence process of the central spin-system when the spin chain is in weak transverse fields, but it gives weak effect in the strong transverse field. The decoherence process of the central system changed dramatically along the line of the critical points, and this may be explained as the reflection of quantum phase transitions.
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| 关 键 词： | 脱散 自旋链环境 各向异性 横向场 量子论 |
| 收稿时间： | 2006-06-14 |
| 修稿时间： | 2006-06-14 |
Decoherence Induced by Spin Chain Environment |
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| WANG Lin-Cheng, CUI Hai-Tao, YI Xue-Xi.Decoherence Induced by Spin Chain Environment[J].Chinese Physics Letters,2006,23(10):2648-2651. |
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| Authors: | WANG Lin-Cheng CUI Hai-Tao YI Xue-Xi |
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| Institution: | Department of Physics, Dalian University of Technology, Dalian 116024 |
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