Pulse-gated quantum dot hybrid qubit
Quantum Physics
2013-08-26 v1 Mesoscale and Nanoscale Physics
Abstract
A quantum dot hybrid qubit formed from three electrons in a double quantum dot has the potential for great speed, due to presence of level crossings where the qubit becomes charge-like. Here, we show how to take full advantage of the level crossings in a pulsed gating scheme, which decomposes the spin qubit into a series of charge transitions. We develop one and two-qubit dc quantum gates that are simpler than the previously proposed ac gates. We obtain closed form solutions for the control sequences and show that these sub-nanosecond gates can achieve high fidelities.
Cite
@article{arxiv.1207.5581,
title = {Pulse-gated quantum dot hybrid qubit},
author = {Teck Seng Koh and John King Gamble and Mark Friesen and M. A. Eriksson and S. N. Coppersmith},
journal= {arXiv preprint arXiv:1207.5581},
year = {2013}
}
Comments
~5 pages, 3 figures, includes supplemental information