Exchange-controlled single-electron-spin rotations in quantum dots

Details Exchange-controlled single-electron-spin rotations in quantum dots Exchange-controlled single-electron-spin rotations in quantum dots

2006-10-16

arxiv.org/abs/cond-mat/0610443v2

Phys. Rev. B 75, 161302(R) (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4+ pages, 3 figures; v2: Streamlined presentation, final version published in PRB (Rapid Comm.)

Scientific paper

10.1103/PhysRevB.75.161302

We show theoretically that arbitrary coherent rotations can be performed quickly (with a gating time ~1 ns) and with high fidelity on the spin of a single confined electron using control of exchange only, without the need for spin-orbit coupling or ac fields. We expect that implementations of this scheme would achieve gate error rates on the order of \eta ~ 10^{-3} in GaAs quantum dots, within reach of several known error-correction protocols

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