Nonstationary dephasing of two level systems
Mesoscale and Nanoscale Physics
2009-11-10 v2
Abstract
We investigate the influence of nonstationary 1/f^mu noise, produced by interacting defects, on a quantum two-level system. Adopting a simple phenomenological model for this noise we describe exactly the corresponding dephasing in various regimes. The nonstationarity and pronounced non-Gaussian features of this noise induce new anomalous dephasing scenarii. Beyond a history-dependent critical coupling strength the dephasing time exhibits a strong dependence on the age of the noise and the decay of coherence is not exponential.
Cite
@article{arxiv.cond-mat/0403750,
title = {Nonstationary dephasing of two level systems},
author = {Josef Schriefl and Maxime Clusel and David Carpentier and Pascal Degiovanni},
journal= {arXiv preprint arXiv:cond-mat/0403750},
year = {2009}
}