Designing Robust Unitary Gates: Application to Concatenated Composite Pulse
Quantum Physics
2011-12-20 v3
Abstract
We propose a simple formalism to design unitary gates robust against given systematic errors. This formalism generalizes our previous observation [Y. Kondo and M. Bando, J. Phys. Soc. Jpn. 80, 054002 (2011)] that vanishing dynamical phase in some composite gates is essential to suppress amplitude errors. By employing our formalism, we naturally derive a new composite unitary gate which can be seen as a concatenation of two known composite unitary operations. The obtained unitary gate has high fidelity over a wider range of the error strengths compared to existing composite gates.
Cite
@article{arxiv.1105.0744,
title = {Designing Robust Unitary Gates: Application to Concatenated Composite Pulse},
author = {Tsubasa Ichikawa and Masamitsu Bando and Yasushi Kondo and Mikio Nakahara},
journal= {arXiv preprint arXiv:1105.0744},
year = {2011}
}
Comments
7 pages, 4 figures. Major revision: improved presentation in Sec. 3, references and appendix added