Quantum information processing using designed defect states in: 2D anti-dot lattices

Jesper Pedersen, Christian Flindt, Niels Asger Mortensen, Antti-Pekka Jauho

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

    Abstract

    We propose a new physical implementation of spin qubits for quantum information processing, namely defect states in antidot lattices de¯ned in the two-dimensional electron gas at a semiconductor heterostructure. Calculations of the band structure of the periodic antidot lattice are presented. A point defect is created by removing a single antidot, and calculations show that localized states form that are to a high degree localized within the defect, with an energy structure which is robust against thermal dephasing. The exchange coupling between two electrons con¯ned to two tunnel-coupled defect states is calculated numerically.We ¯nd results reminiscent of double quantum dot structures, indicating that the suggested structure is a feasible physical implementation of spin qubits.
    Original languageEnglish
    Title of host publicationProceeding of AIP Conference
    Number of pages821
    Volume893
    Publication date2007
    Publication statusPublished - 2007
    EventAIP Conference -
    Duration: 1 Jan 2007 → …

    Conference

    ConferenceAIP Conference
    Period01/01/2007 → …

    Keywords

    • quantum computing
    • antidot lattice
    • EP2DS-17
    • exchange coupling

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