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Entanglement Dynamics of Two Spin Qubits in a Spin Environment with Nonuniform Coupling

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Abstract

We investigate the entanglement dynamics of a two-spin-qubit system coupled to a spin environment with nonuniform coupling through using the time-dependent density-matrix renormalization group method. We show that the entanglement generation and decay depend on the number of environment spins, the coupling strength between the central spin system and the environment, and the initial state of the central spin system.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 11105020, 10975181, and 11175247), the Scientific Research Fund of Hunan Provincial Education Department under Grant No. 13B134, the construct program of the key discipline in Hunan province and the Aid program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province.

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Authors and Affiliations

  1. School of Physics and Electronic Science, Changsha University of Science and Technology, Changsha, 410004, China

    Yu Guo

  2. College of Physical Science and Technology, Huanggang Normal University, Huanggang, 438000, China

    Hong-Liang Deng

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  1. Yu Guo
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  2. Hong-Liang Deng
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Correspondence to Yu Guo.

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Guo, Y., Deng, HL. Entanglement Dynamics of Two Spin Qubits in a Spin Environment with Nonuniform Coupling. Int J Theor Phys 53, 1459–1465 (2014). https://doi.org/10.1007/s10773-013-1944-1

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  • DOI: https://doi.org/10.1007/s10773-013-1944-1

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