| Boundary Quantum Entanglement of the XXZ Spin Chain with Boundary Impurities |
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| 作者姓名： | 卓伟 王玉鹏 |
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| 作者单位： | Institute of Physics, Chinese Academy of Sciences, Beijing 100080 |
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| 摘 要： | The boundary quantum entanglement for the s = 1/2 X X Z spin chain with boundary impurities is studied via the density matrix renormalization group （DMRG） method. It is shown that the entanglement entropy of the boundary bond （the impurity and the chain spin next to it） behaves differently in different phases. The relationship between the singular points of the boundary entropy and boundary quantum critical points is discussed.
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| 关 键 词： | 量子理论 纠缠 边缘杂质 XXZ自旋链 |
| 收稿时间： | 2007-05-21 |
Boundary Quantum Entanglement of the XXZ Spin Chain with Boundary Impurities |
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| ZHUO Wei,WANG Yu-Peng.Boundary Quantum Entanglement of the XXZ Spin Chain with Boundary Impurities[J].Chinese Physics Letters,2007,24(12):3320-3321. |
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| Authors: | ZHUO Wei WANG Yu-Peng |
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| Affiliation: | Institute of Physics, Chinese Academy of Sciences, Beijing 100080 |
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| Abstract: | The boundary quantum entanglement for the s=1/2 XXZ spin chain with boundary impurities is studied via the density matrix renormalization group (DMRG) method. It is shown that the entanglement entropy of the boundary bond (the impurity and the chain spin next to it) behaves differently in different phases. The relationship between the singular points of the boundary entropy and boundary quantum critical points is discussed. |
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| Keywords: | 03 67 Mn 03 65 Ud 75 10 Jm |
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