Dephasing by a nonstationary classical intermittent noise

Details Dephasing by a nonstationary classical intermittent noise Dephasing by a nonstationary classical intermittent noise

2005-01-12

arxiv.org/abs/cond-mat/0501301v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.72.035328

We consider a new phenomenological model for a $1/f^{\mu}$ classical intermittent noise and study its effects on the dephasing of a two-level system. Within this model, the evolution of the relative phase between the $|\pm>$ states is described as a continuous time random walk (CTRW). Using renewal theory, we find exact expressions for the dephasing factor and identify the physically relevant various regimes in terms of the coupling to the noise. In particular, we point out the consequences of the non-stationarity and pronounced non-Gaussian features of this noise, including some new anomalous and aging dephasing scenarii.

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