Potential Errors in a Scheme of Universal Quantum Gates in Kane's Model
Quantum Physics
2009-06-06 v4
Abstract
We re--investigate a plausible proposal for universal quantum gates in Kane's model, in which the authors assumed that electron spin is always downward under a background magnetic field and the value of controlling parameters is varied instantaneously. We demonstrate that a considerable error appears, for example, in the X rotation. As result, the controlled operations don't work. Such a failure is caused by improper choice of the computational bases; actually, the electron spin is not always downward over time during quantum operations.
Keywords
Cite
@article{arxiv.quant-ph/0509096,
title = {Potential Errors in a Scheme of Universal Quantum Gates in Kane's Model},
author = {Yukihiro Ota and Shuji Mikami and Ichiro Ohba},
journal= {arXiv preprint arXiv:quant-ph/0509096},
year = {2009}
}
Comments
11 pages, 3 figures; improved with typos corrected; Accepted for publication in Phys. Rev. A