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Coherent state transfer through a multi-channel quantum network: Natural versus controlled evolution passage

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Abstract

Quantum state transfer (QST) is an important task in quantum information processing. In this study, we describe two approaches for the high-fidelity transfer of a quantum state between two opposite quantum dots attached to a multi-channel quantum network. First, we demonstrate that a high-efficiency QST can be achieved with the coherent time evolution of a quantum system without any external control. Second, we present an approach that uses an alternative mechanism for a high-fidelity QST. By adiabatically varying tunnel couplings, it is possible to implement the complete transmission of a quantum state based on this quantum mechanical mechanism.

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Authors and Affiliations

  1. College of Electronics, Communication and Physics, Shandong University of Science and Technology, Qingdao, 266510, China

    Bing Chen

  2. Beijing Computational Science Research Center, Beijing, 100084, China

    Bing Chen & Yong Li

  3. Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, 230026, China

    Yong Li

Authors
  1. Bing Chen
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  2. Yong Li
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Correspondence to Bing Chen.

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Chen, B., Li, Y. Coherent state transfer through a multi-channel quantum network: Natural versus controlled evolution passage. Sci. China Phys. Mech. Astron. 59, 640302 (2016). https://doi.org/10.1007/s11433-016-5791-y

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  • DOI: https://doi.org/10.1007/s11433-016-5791-y

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