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Sudden Change of Quantum Discord in Qutrit-Qutrit System Under Depolarising Noise

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Abstract

The effects of decoherence on quantum discord of two-qutrit system under the influence of multilocal, collective and global depolarising noises are investigated. Sudden change of quantum discord with the decoherence parameter and the initial state parameter occurs for the qutrits being coupled to multilocal or global depolarising noises. On the other hand, decoherence cannot induce sudden change of quantum discord when the system is collectively coupled to the depolarising noise. In addition, the local unitary transformation can alter the region in which the phenomenon of sudden change exists.

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Acknowledgements

This work was supported by “the Fundamental Research Funds for the Central Universities” of China University of Mining and Technology under Grant No. 2012QNA37 and National Natural Science Foundation of China under Grant Nos. 11304377 and 11375168.

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Authors and Affiliations

  1. Department of Physics, China University of Mining and Technology, Xuzhou, 221116, China

    Liang Qiu, Gang Tang, Xianqing Yang & Zhipeng Xun

  2. School of Information and Electrical Engineering, China University of Mining and Technology, Xuzhou, 221116, China

    Bin Ye

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

    Anmin Wang

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  1. Liang Qiu
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  2. Gang Tang
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  3. Xianqing Yang
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  4. Zhipeng Xun
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Correspondence to Liang Qiu.

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Qiu, L., Tang, G., Yang, X. et al. Sudden Change of Quantum Discord in Qutrit-Qutrit System Under Depolarising Noise. Int J Theor Phys 53, 2769–2777 (2014). https://doi.org/10.1007/s10773-014-2073-1

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  • DOI: https://doi.org/10.1007/s10773-014-2073-1

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