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Thermal Entanglement in a Two-Qubit Heisenberg XXZ Spin Chain Under a Single Pulse Magnetic Field

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Abstract

The thermal entanglement in a two-qubit Heisenberg XXZ spin chain is investigated under a single pulse magnetic field Bsinθ. The paper shows that the greater the contribution of the inhomogeneity on the exchange interaction, the higher thermal entanglement will be attained at the fixed temperature except the case that \(\theta=2k\pi+\frac{3}{2}\pi\). J z  significantly disturb the thermal entanglement in uniform case. When the structure of the spin system are given, changing the external magnetic field B can induce controllable entanglement. Our study may provide a useful tool to change the entanglement of spin chain system.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China Project (Grant No. 11147010), the Natural Science Foundation of Inner Mongolia (Grant No. 2012MS0113), the Research Program of Higher Education of Inner Mongolia Autonomous Region (Grant No. NJZY12111) and the Innovation Found of Inner Mongolia University of Science and Technology (Grant No. 2010NC066).

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Authors and Affiliations

  1. School of Mathematics, Physics and Biological Engineering, Inner Mongolia University of Science and Technology, Baotou, 014010, China

    Jia Liu & Xiao-Hong Du

  2. Key laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources IMUST, Baotou, 014010, China

    Jia Liu

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  1. Jia Liu
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  2. Xiao-Hong Du
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Correspondence to Jia Liu.

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Liu, J., Du, XH. Thermal Entanglement in a Two-Qubit Heisenberg XXZ Spin Chain Under a Single Pulse Magnetic Field. Int J Theor Phys 52, 2623–2630 (2013). https://doi.org/10.1007/s10773-013-1550-2

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  • DOI: https://doi.org/10.1007/s10773-013-1550-2

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