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    National Tsing Hua University Institutional Repository > 電機資訊學院 > 電機工程學系 > 期刊論文 >  Graphene quantum dots for valley-based quantum computing: A feasibility study


    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/83474


    Title: Graphene quantum dots for valley-based quantum computing: A feasibility study
    Authors: G. Y. Wu;N.-Y. Lue;L. Chang
    教師: 吳玉書
    Date: 2011
    Publisher: American Physical Society
    Relation: PHYSICAL REVIEW B, American Physical Society, Volume 84, Issue 19, NOV 28 2011, Article Number 195463
    Keywords: COMPUTATION
    SINGLE-ELECTRON SPIN
    DECOHERENCE
    Abstract: The rise of graphene opens a door to qubit implementation, as discussed in the recent proposal of valley pair qubits in double quantum dots of gapped graphene (G. Y. Wu, N.-Y. Lue, and L. Chang, arXiv:1104.0443). The work here presents the comprehensive theory underlying the proposal. It discusses the interaction of electrons with external magnetic and electric fields in such structures. Specifically, it examines a strong, unique mechanism, i.e., the analog of the first-order relativistic effect in gapped graphene. This mechanism is state mixing free and allows, together with electrically tunable exchange coupling, a fast, all-electric manipulation of qubits via electric gates, in the time scale of ns. The work also looks into the issue of fault tolerance in a typical case, yielding at 10 K a long qubit coherence time [similar to O(ms)].
    Relation Link: http://www.aps.org/
    URI: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/83474
    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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