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Quantum Dense Coding About a Two-Qubit Heisenberg XYZ Model

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Abstract

By taking into account the nonuniform magnetic field, the quantum dense coding with thermal entangled states of a two-qubit anisotropic Heisenberg XYZ chain are investigated in detail. We mainly show the different properties about the dense coding capacity (χ) with the changes of different parameters. It is found that dense coding capacity χ can be enhanced by decreasing the magnetic field B, the degree of inhomogeneity b and temperature T, or increasing the coupling constant along z-axis J z . In addition, we also find χ remains the stable value as the change of the anisotropy of the XY plane Δ in a certain temperature condition. Through studying different parameters effect on χ, it presents that we can properly turn the values of B, b, J z , Δ or adjust the temperature T to obtain a valid dense coding capacity (χ satisfies χ > 1). Moreover, the temperature plays a key role in adjusting the value of dense coding capacity χ. The valid dense coding capacity could be always obtained in the lower temperature-limit case.

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Acknowledgements

This project was supported by the Natural Science Foundation for Young Scientists of Shanxi Province, China (Grant No. 2012021003-3) and the Special Funds of the National Natural Science Foundation of China (Grant No. 11247247).

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Authors and Affiliations

  1. College of Physics and Electronics Engineering, Shanxi University, Taiyuan, 030006, People’s Republic of China

    Hui-Yun Xu

  2. School of Physics and Information Engineering, Shanxi Normal University, Linfen, 041004, People’s Republic of China

    Guo-Hui Yang

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  1. Hui-Yun Xu
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  2. Guo-Hui Yang
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Correspondence to Guo-Hui Yang.

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Xu, HY., Yang, GH. Quantum Dense Coding About a Two-Qubit Heisenberg XYZ Model. Int J Theor Phys 56, 2803–2810 (2017). https://doi.org/10.1007/s10773-017-3445-0

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  • DOI: https://doi.org/10.1007/s10773-017-3445-0

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