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Entanglement in a two-spin (1/2, 3/2) mixed-spin Heisenberg XX chain with an inhomogeneous external magnetic field

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Abstract

By using the concept of negativity, we investigate the thermal entanglement of a two-spin (1/2, 3/2) mixed-spin Heisenberg XX chain with an inhomogeneous external magnetic field. We obtain the analytical results of entanglement of this model. For the case of uniform magnetic field, we find that the critical temperature is higher than the results of the spin-1/2 chain and (1/2,1) mixed-spin chain. And by adjusting the nonuniform parameter b, one is able to obtain more entanglement at a higher temperature.

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Authors and Affiliations

  1. School of Applied Science, Jiangxi University of Science and Technology, Ganzhou, 341000, China

    KeTao Guo, MingChao Liang, HongYu Xu & ChengBo Zhu

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  1. KeTao Guo
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  2. MingChao Liang
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  3. HongYu Xu
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  4. ChengBo Zhu
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Correspondence to KeTao Guo.

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Guo, K., Liang, M., Xu, H. et al. Entanglement in a two-spin (1/2, 3/2) mixed-spin Heisenberg XX chain with an inhomogeneous external magnetic field. Sci. China Phys. Mech. Astron. 54, 491–495 (2011). https://doi.org/10.1007/s11433-011-4257-5

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  • DOI: https://doi.org/10.1007/s11433-011-4257-5

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