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Entanglement in spin-1 Heisenberg XY chain

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Abstract

We investigated the quantum entanglement in spin-1 Heisenberg XY chain for two-spin-qutrit and multi-particle systems. As a measure of the entanglement, the negativity of this state was analyzed as a function of the temperature and the magnetic field. We gave some numerical results and discussed them in detail. We found that the negativity increases monotonously with the coupling constants |J 1| and |J 2|, and it showed a symmetry with respect to the point of J 1 = 0 and J 2 = 0. In addition to the above features, there is evidence that the critical temperature is independent of the length of the chain.

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Authors and Affiliations

  1. School of Science, Xi’an Jiaotong University, Xi’an, 710049, China

    Meng Qin & YingJuan Tao

  2. Xi’an Institute of Post and Telecommunications, Xi’an, 710061, China

    MingLiang Hu & DongPing Tian

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  1. Meng Qin
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  2. YingJuan Tao
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  3. MingLiang Hu
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  4. DongPing Tian
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Correspondence to Meng Qin.

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Qin, M., Tao, Y., Hu, M. et al. Entanglement in spin-1 Heisenberg XY chain. Sci. China Ser. G-Phys. Mech. Astron. 51, 817–822 (2008). https://doi.org/10.1007/s11433-008-0087-5

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  • DOI: https://doi.org/10.1007/s11433-008-0087-5

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