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 and Materials Physics)
Volume77
Issue number4
Pages (from-to)045325
ISSN2469-9969
DOIs
Publication statusPublished - 2008
Externally publishedYes

Bibliographical note

Copyright 2008 American Physical Society

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