Dephasing of solid-state qubits at optimal points
Mesoscale and Nanoscale Physics
2007-05-23 v2 Quantum Physics
Abstract
Motivated by recent experiments with Josephson-junction circuits, we analyze the influence of various noise sources on the dynamics of two-level systems at optimal operation points where the linear coupling to low-frequency fluctuations is suppressed. We study the decoherence due to nonlinear (quadratic) coupling, focusing on the experimentally relevant 1/f and Ohmic noise power spectra. For 1/f noise strong higher-order effects influence the evolution.
Cite
@article{arxiv.cond-mat/0308297,
title = {Dephasing of solid-state qubits at optimal points},
author = {Yuriy Makhlin and Alexander Shnirman},
journal= {arXiv preprint arXiv:cond-mat/0308297},
year = {2007}
}
Comments
minor corrections and clarifications