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    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/83472

    Title: Graphene-based qubits in quantum communications
    Authors: G. Y. Wu;N.-Y. Lue
    教師: 吳玉書
    Date: 2012
    Publisher: American Physical Society
    Relation: PHYSICAL REVIEW B, American Physical Society, Volume 86, Issue 4, JUL 30 2012, Article Number 045456
    Keywords: LINEAR OPTICS
    Abstract: We explore the potential application of graphene-based qubits in photonic quantum communications. In particular, the valley pair qubit in double quantum dots of gapped graphene is investigated as a quantum memory in the implementation of quantum repeaters. For the application envisioned here, our work extends the recent study of the qubit [Wu et al., arXiv:1104.0443; Phys. Rev. B 84, 195463 (2011)] to the case where the qubit is placed in an in-plane magnetic field configuration. It develops, for the configuration, a method of qubit manipulation, based on a unique ac electric field-induced, valley-orbit interaction-derived mechanism in gapped graphene. It also studies the optical response of graphene quantum dots in the configuration, in terms of valley excitation with respect to photonic polarization, and illustrates faithful photon <-> valley quantum state transfers. This work suggests the interesting prospect of an all-graphene approach for the solid state components of a quantum network, e.g., quantum computers and quantum memories in communications.
    Relation Link: http://www.aps.org/
    URI: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/83472
    Appears in Collections:[電機工程學系] 期刊論文
    [電子工程研究所] 期刊論文
    [物理系] 期刊論文

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