Keeping a Quantum Bit Alive by Optimized $\pi$-Pulse Sequences
Quantum Physics
2011-11-09 v2 Mesoscale and Nanoscale Physics
Statistical Mechanics
Strongly Correlated Electrons
Abstract
A general strategy to maintain the coherence of a quantum bit is proposed. The analytical result is derived rigorously including all memory and back-action effects. It is based on an optimized -pulse sequence for dynamic decoupling extending the Carr-Purcell-Meiboom-Gill (CPMG) cycle. The optimized sequence is very efficient, in particular for strong couplings to the environment.
Cite
@article{arxiv.quant-ph/0609203,
title = {Keeping a Quantum Bit Alive by Optimized $\pi$-Pulse Sequences},
author = {Götz S. Uhrig},
journal= {arXiv preprint arXiv:quant-ph/0609203},
year = {2011}
}
Comments
4 pages, 2 figures; revised version with additional references for better context, more stringent discussion