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Dynamics and Protection of Quantum Discord for Two Uncoupled Qubits Driven by Classical Phase Noisy Laser

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Abstract

In this paper, the dynamics and protection of quantum discord for two uncoupled qubits driven by classical phase noisy laser(CPNL) is investigated. The results show that, the dynamics of quantum discord depends on the ratio of CPNL rate and the system-environment coupling strength. The quantum discord can be well protected by increasing the ratio in the Markovian classical noise region or by decreasing the ratio in the non-Markovian classical noise region. Besides, we explain the revivals of the quantum discord by means of the increase of parameter used to quantify non-Markovianty of the single qubit dynamics in the non-Markovian classical noise region.

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Authors and Affiliations

  1. Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, and Department of Physics, Hunan Normal University, Changsha, 410081, People’s Republic of China

    You-Neng Guo, Mao-Fa Fang, Bai-Yuan Yang, Hong-Mei Zou & Xiang Liu

Authors
  1. You-Neng Guo
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  2. Mao-Fa Fang
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  3. Bai-Yuan Yang
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  4. Hong-Mei Zou
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  5. Xiang Liu
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Corresponding author

Correspondence to Mao-Fa Fang.

Additional information

Projects supported by the National Natural Science Foundation of China(Grant Nos.11374096 and 11074072)and Hunan Provincial Innovation Foundation for Postgraduate (CX2014B194).

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Guo, YN., Fang, MF., Yang, BY. et al. Dynamics and Protection of Quantum Discord for Two Uncoupled Qubits Driven by Classical Phase Noisy Laser. Int J Theor Phys 54, 830–839 (2015). https://doi.org/10.1007/s10773-014-2277-4

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  • DOI: https://doi.org/10.1007/s10773-014-2277-4

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