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Non-Classical Correlations and Transfer of Quantum Information in a Superconducting Qubit System with Dynamical Decoupling Pulses

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Abstract

We investigate the dynamics of non-classical correlations(entanglement and quantum discord) of the system consisting of two non-interacting superconducting qubits coupling with a common data bus, where the system is driven by the dynamical decoupling pulses. It is found that the non-classical correlations between two superconducting qubits can be increased by appling a train of dynamical decoupling pulses. Furthermore, we also explore the influence of the dynamical decoupling pulses on the information flowing between superconducting qubits and data bus by making use of the trace distance. It is shown that the dynamical decoupling pulses can protect quantum information of two superconducting qubits and force information to flow back to the superconducting qubits from the data bus.

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Acknowledgements

This project was supported by the National Natural Science Foundation of China (Grant Nos.11364006,11447210,11805065), the Natural Science and Technology Foundation of Guizhou Province (Grant Nos.[2017]7343,[2013]2231,[2013]2232), the Natural Science and Technology Foundation of the Education Department of Guizhou Province (Grant No.[2014]242), the Doctor funding of Guizhou Normal University, the Key laboratory of low dimensional condensed matter physics of higher educational institution of Guizhou province(Grant No.[2016]002), College Students’ Scientific Research Training Plan of Guizhou Normal University(Grant No.2017013).

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Authors and Affiliations

  1. School of Physics and Electronics, Guizhou Normal University, Guiyang, 550001, China

    Qi-Liang He, Jian Sun, Yong-Jun Xiao & Wan-Ting Cheng

  2. Department of Mathematics and Physics, North China Electric Power University, Beijing, 102206, China

    Ye-Qi Zhang

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  1. Qi-Liang He
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  2. Jian Sun
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Correspondence to Qi-Liang He.

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He, QL., Sun, J., Xiao, YJ. et al. Non-Classical Correlations and Transfer of Quantum Information in a Superconducting Qubit System with Dynamical Decoupling Pulses. Int J Theor Phys 58, 969–978 (2019). https://doi.org/10.1007/s10773-018-3988-8

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  • DOI: https://doi.org/10.1007/s10773-018-3988-8

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