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Quantum discord of thermal states of a spin chain with Calogero-Moser type interaction

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Abstract

In this paper, we have investigated the effect of Calogero-Moser type interaction on the quantum discord of thermal states of a spin chain. Our results imply that the quantum discord depends on the relative distance between the spins, the external magnetic field, and the temperature. By a comparison between the quantum discord and the entanglement of formation, the quantum discord is more robust than the entanglement of formation in the sense that the latter takes a zero value in a large range of the parameters, while the former takes a nonzero value.

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Authors and Affiliations

  1. School of Electric Engineering and Information, Anhui University of Technology, Ma’anshan, 243002, China

    XiaoSan Ma, Ying Qiao & GuangXing Zhao

  2. Department of Modern Physics, University of Science and Technology of China, Hefei, 230026, China

    AnMin Wang

Authors
  1. XiaoSan Ma
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  2. Ying Qiao
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  3. GuangXing Zhao
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  4. AnMin Wang
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Correspondence to XiaoSan Ma.

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Ma, X., Qiao, Y., Zhao, G. et al. Quantum discord of thermal states of a spin chain with Calogero-Moser type interaction. Sci. China Phys. Mech. Astron. 56, 600–605 (2013). https://doi.org/10.1007/s11433-012-4870-y

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  • DOI: https://doi.org/10.1007/s11433-012-4870-y

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