Josef Schriefl, Maxime Clusel, David Carpentier, Pascal Degiovanni
Published 2004-03-31, updated 2005-01-11Version 2
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.
Journal: Europhysics Letters 69 (2005) 156
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