Spin qubits in antidot lattices

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

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    Abstract

    We suggest and study designed defects in an otherwise periodic potential modulation of a two-dimensional electron gas as an alternative approach to electron spin based quantum information processing in the solid-state using conventional gate-defined quantum dots. We calculate the band structure and density of states for a periodic potential modulation, referred to as an antidot lattice, and find that localized states appear, when designed defects are introduced in the lattice. Such defect states may form the building blocks for quantum computing in a large antidot lattice, allowing for coherent electron transport between distant defect states in the lattice, and for a tunnel coupling of neighboring defect states with corresponding electrostatically controllable exchange coupling between different electron spins.
    Original languageEnglish
    JournalPhysical Review B Condensed Matter
    Volume77
    Issue number4
    Pages (from-to)045325
    ISSN0163-1829
    DOIs
    Publication statusPublished - 2008

    Bibliographical note

    Copyright 2008 American Physical Society

    Keywords

    • STATES
    • ELECTRON WAVEPACKET PROPAGATION
    • FABRICATION
    • COMPUTATION
    • FIBERS
    • COUPLED QUANTUM DOTS

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