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Quantum Correlation in Circuit QED Under Various Dissipative Modes

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Abstract

Dynamical evolutions of quantum correlations in circuit quantum electrodynamics (circuit-QED) are investigated under various dissipative modes. The influences of photon number, coupling strength, detuning and relative phase angle on quantum entanglement and quantum discord are compared as well. The results show that quantum discord may be less robust to decoherence than quantum entanglement since the death and revival also appears. Under certain dissipative mode, the decoherence subspace can be formed in circuit-QED due to the cooperative action of vacuum field. Whether a decoherence subspace can be formed not only depends on the form of quantum system but also relates closely to the dissipative mode of environment. One can manipulate decoherence through manipulating the correlation between environments, but the effect depends on the choice of initial quantum states and dissipative modes. Furthermore, we find that proper relative phase of initial quantum state provides one means of suppressing decoherence.

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Acknowledgments

This work is supported by the National Natural Science Foundation of China under Grant No. 11164009.

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Authors and Affiliations

  1. Department of Physics, Jiangxi Normal University, Nanchang, Jiangxi, 330022, China

    Ji Ying-Hua

  2. College of Mathematics and Information Science, Jiangxi Normal University, Nanchang, 330022, China

    Liu Yong-Mei

  3. Key Laboratory of Photoelectronics and Telecommunication of Jiangxi Province, Nanchang, Jiangxi, 330022, China

    Ji Ying-Hua

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  1. Ji Ying-Hua
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  2. Liu Yong-Mei
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Correspondence to Ji Ying-Hua.

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Ying-Hua, J., Yong-Mei, L. Quantum Correlation in Circuit QED Under Various Dissipative Modes. Int J Theor Phys 56, 284–301 (2017). https://doi.org/10.1007/s10773-016-3161-1

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  • DOI: https://doi.org/10.1007/s10773-016-3161-1

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