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 language | English |
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Title of host publication | Proceeding of AIP Conference |
Number of pages | 821 |
Volume | 893 |
Publication date | 2007 |
Publication status | Published - 2007 |
Keywords
- quantum computing
- antidot lattice
- EP2DS-17
- exchange coupling