Dephasing due to nonstationary 1/f noise
Mesoscale and Nanoscale Physics
2007-05-23 v1 Quantum Physics
Abstract
Motivated by recent experiments with Josephson qubits we propose a new phenomenological model for 1/f noise due to collective excitations of interacting defects in the qubit's environment. At very low temperatures the effective dynamics of these collective modes are very slow leading to pronounced non-Gaussian features and nonstationarity of the noise. We analyze the influence of this noise on the dynamics of a qubit in various regimes and at different operation points. Remarkable predictions are absolute time dependences of a critical coupling and of dephasing in the strong coupling regime.
Keywords
Cite
@article{arxiv.cond-mat/0404641,
title = {Dephasing due to nonstationary 1/f noise},
author = {J. Schriefl and M. Clusel and D. Carpentier and P. Degiovanni and Yu. Makhlin},
journal= {arXiv preprint arXiv:cond-mat/0404641},
year = {2007}
}
Comments
4 pages, 2 figures, to be published in the proceedings of the Vth Rencontres de Moriond in Mesoscopic Physics