| Entanglement in the Ground State of an Isotropic Three-Qubit Transverse XY Chain with Energy Current |
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| 作者姓名： | 刘丹 张勇 刘洋 龙桂鲁 |
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| 作者单位： | [1]Key Laboratory for Atomic and Molecular Nanosciences and Department of Physics, Tsinghua University, Beijing 100084 [2]Tsinghua National Laboratory For Information Science and Technology, Beijing 100084 [3]Institute of Physics, School of Sciences, Beijing University of Posts and Telecommunications, Beijing 100876 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 10447116, 10325521 and 60433050, the State Key Basic Research Programme of China under Grant No 2006CB0L0106, the SRFDP of Higher Education of China under Grant No 20060003048, and the Key Project of the Ministry of Education of China under Grant No 306020. |
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| 摘 要： | The ground state entanglement in an isotropic three-qubit transverse XY chain with energy current is analysed. A quantum phase transition from a no-energy-current phase to energy-current phase is found when the magnetic field changes. It has also been found that the ground state changes in company with the quantum phase transition.
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| 关 键 词： | 缠结 等方性 能量电流 地面水平 |
| 修稿时间： | 2006-10-11 |
Entanglement in the Ground State of an Isotropic Three-Qubit Transverse XY Chain with Energy Current |
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| LIU Dan,ZHANG Yong,LIU Yang,LONG Gui-Lu.Entanglement in the Ground State of an Isotropic Three-Qubit Transverse XY Chain with Energy Current[J].Chinese Physics Letters,2007,24(1):8-10. |
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| Authors: | LIU Dan ZHANG Yong LIU Yang LONG Gui-Lu |
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| Institution: | Key Laboratory for Atomic and Molecular Nanosciences and Department of Physics, Tsinghua University, Beijing 100084
Tsinghua National Laboratory For Information Science and Technology, Beijing 100084
Institute of Physics, School of Sciences, Beijing University of Posts and Telecommunications, Beijing 100876 |
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| Abstract: | The ground state entanglement in an isotropic three-qubit transverse XY chain with energy current is analysed. A quantum phase transition from a no-energy-current phase to energy-current phase is found when the magnetic field changes. It has also been found that the ground state changes in company with the quantum phase transition. |
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| Keywords: | 03 65 Ud 03 67 Mn |
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