Chinese Journal of Quantum Electronics, Volume. 35, Issue 4, 444(2018)

Thermal entanglement in Heisenberg chain with Dzyaloshinski-Moriya interaction in external magnetic fields

Liyuan HUANG1、* and Maofa FANG2
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
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    Influences of the Dzyaloshinskii-Moriya(DM) coupling constant D, temperature T, uniform external magnetic field B, nonuniform magnetic field b, real coupling constant J and anisotropic parameter Δ on the thermal entanglement concurrence C are investigated in detail. Results show that both the increasing of T and B decrease C, but the increasing of D develops C, and D can also heighten the magnetic field threshold Bt. When B is bigger or less than Bt, b has different influence on C. By comparison, it is found that the B and b have different effects on the area about J and Δ (JΔ>0) where exists thermal entanglement as well as on C. What’s more, as T increases, the variation rule of the range of B in which exists thermal entanglement is different from b. As a result, the thermal entanglement can be controlled by adjusting the values of B, b, J, D, T and Δ in various terrible environments, such as strong external magnetic field, or high temperature environment, which is useful in the research of quantum information in solid systems.

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    HUANG Liyuan, FANG Maofa. Thermal entanglement in Heisenberg chain with Dzyaloshinski-Moriya interaction in external magnetic fields[J]. Chinese Journal of Quantum Electronics, 2018, 35(4): 444

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    Paper Information

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    Received: May. 15, 2017

    Accepted: --

    Published Online: Aug. 24, 2018

    The Author Email: Liyuan HUANG (lyhuang@xujc.com)

    DOI:10.3969/j.issn.1007-5461.2018.04.010

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