Coherence stabilization of a two-qubit gate by AC fields
Mesoscale and Nanoscale Physics
2007-05-23 v1 Statistical Mechanics
Abstract
We consider a CNOT gate operation under the influence of quantum bit-flip noise and demonstrate that ac fields can change bit-flip noise into phase noise and thereby improve coherence up to several orders of magnitude while the gate operation time remains unchanged. Within a high-frequency approximation, both purity and fidelity of the gate operation are studied analytically. The numerical treatment with a Bloch-Redfield master equation confirms the analytical results.
Keywords
Cite
@article{arxiv.cond-mat/0409774,
title = {Coherence stabilization of a two-qubit gate by AC fields},
author = {Karen M. Fonseca Romero and Sigmund Kohler and Peter Hänggi},
journal= {arXiv preprint arXiv:cond-mat/0409774},
year = {2007}
}
Comments
4 pages, 2 figures