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Quantum discord in the three-spin XXZ chain with Dzyaloshinskii-Moriya interaction

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Abstract

The quantum discord (QD) of a three-qubit Heisenberg XXZ system with the Dzyaloshinskii-Moriya (DM) interaction parameter is investigated, and the three-qubit QD under Ornstein-Uhlenbeck noise is calculated. We find that both DM interaction parameter D z and anisotropic parameter J z can increase QD and entanglement but D z is a more efficient parameter in the antiferromagnetic case. We observe a complex range of QD with the change of D z and a sudden change of QD with the variation of J z in the ferromagnetic case. We show that the decrease durations of both QD and entanglement can be prolonged by increasing DM interaction and reducing noise bandwidth γ in the evolutionary process.

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Authors and Affiliations

  1. School of Science, Beijing University of Posts and Telecommunications, Beijing, 100876, China

    YinYan Zhu & Yong Zhang

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  1. YinYan Zhu
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  2. Yong Zhang
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Correspondence to Yong Zhang.

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Zhu, Y., Zhang, Y. Quantum discord in the three-spin XXZ chain with Dzyaloshinskii-Moriya interaction. Sci. China Phys. Mech. Astron. 55, 2081–2087 (2012). https://doi.org/10.1007/s11433-012-4871-x

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  • DOI: https://doi.org/10.1007/s11433-012-4871-x

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