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Different dynamics of classical and quantum correlations under decoherence

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Abstract

The dynamics of classical and quantum correlations under nondissipative and dissipative decoherences are analytically and numerically investigated with both one-side measures and two-side measures. Specifically, two qubits under local amplitude damping decoherence and depolarizing decoherence channels are considered. We show that, under the action of amplitude damping decoherence, both the entanglement and correlations of the different types of initial states with same initial values, suffer different types of dynamics. Moreover, the transfers of the entanglement and correlations between the system and the environment for different types of initial states are also shown to be different. While for the action of depolarizing decoherence, there does not exist sudden change in the decay rates of both the classical and quantum correlations, which is different from some other nondissipative channels. Furthermore, the quantum dissonance can be found to keep unchanged under the action of depolarizing decoherence. Such different dynamic behaviors of different noisy quantum decoherence channels reveal distinct transmission performance of classical and quantum information.

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Authors and Affiliations

  1. Department of Electronic Engineering, State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiaotong University, Shanghai, 200240, China

    Peng Huang, Jun Zhu, Xiao-xiao Qi, Guang-qiang He & Gui-hua Zeng

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  1. Peng Huang
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  2. Jun Zhu
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  3. Xiao-xiao Qi
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  4. Guang-qiang He
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  5. Gui-hua Zeng
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Correspondence to Peng Huang.

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Huang, P., Zhu, J., Qi, Xx. et al. Different dynamics of classical and quantum correlations under decoherence. Quantum Inf Process 11, 1845–1865 (2012). https://doi.org/10.1007/s11128-011-0335-x

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