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Mediating and inducing quantum correlation between two separated qubits by one-dimensional plasmonic waveguide

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Abstract

We investigate the dynamics of quantum correlation between two separated qubits trapped in one-dimensional plasmonic waveguide. It is found that for a class of initial states, the quantum discord shows a sudden change phenomenon during the dynamical evolution. Furthermore, we demonstrate that the quantum discord can be enhanced if a proper product of the plasmon wave number and two qubits distance is chosen. Finally, we find that the non-zero quantum discord between two qubits can be created for the states without initial quantum discord during the time evolution of the system.

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Acknowledgments

This project was supported by the National Natural Science Foundation of China (Grant No. 11274274 and 11074310), and the Doctor Funding of Guizhou Normal University.

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Authors and Affiliations

  1. Physics Department, Zhejiang Institute of Modern Physics, Zhejiang University, Hangzhou, 310027, People’s Republic of China

    Qi-Liang He & Jing-Bo Xu

  2. School of Physics and Electronics, Guizhou Normal University, Guiyang, 550001, People’s Republic of China

    Qi-Liang He

  3. State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-sen University, Guangzhou, 510275, People’s Republic of China

    Dao-Xin Yao

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  1. Qi-Liang He
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Correspondence to Jing-Bo Xu.

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He, QL., Xu, JB. & Yao, DX. Mediating and inducing quantum correlation between two separated qubits by one-dimensional plasmonic waveguide. Quantum Inf Process 12, 3023–3031 (2013). https://doi.org/10.1007/s11128-013-0581-1

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  • DOI: https://doi.org/10.1007/s11128-013-0581-1

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