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Boundary Quantum Entanglement of the XXZ Spin Chain with Boundary Impurities |
ZHUO Wei;WANG Yu-Peng |
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Institute of Physics, Chinese Academy of Sciences, Beijing 100080 |
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| Cite this article: |
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ZHUO Wei, WANG Yu-Peng 2007 Chin. Phys. Lett. 24 3320-3321 |
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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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Received: 01 January 1900
Published: 03 December 2007
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| PACS: |
03.67.Mn
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(Entanglement measures, witnesses, and other characterizations)
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03.65.Ud
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(Entanglement and quantum nonlocality)
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75.10.Jm
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(Quantized spin models, including quantum spin frustration)
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