Dynamical suppression of telegraph and 1/f noise due to quantum bistable fluctuator

Details Dynamical suppression of telegraph and 1/f noise due to quantum bistable fluctuator Dynamical suppression of telegraph and 1/f noise due to quantum bistable fluctuator

2003-12-17

arxiv.org/abs/cond-mat/0312442v2

Physical Review A 70, R40101 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Revtex 4, 5 pages, 3 figures. Title revised and some other minor changed. Final version as published in PRA

Scientific paper

10.1103/PhysRevA.70.040101

We study dynamical decoupling of a qubit from non gaussian quantum noise due to discrete sources, as bistable fluctuators and 1/f noise. We obtain analytic and numerical results for generic operating point. For very large pulse frequency, where dynamic decoupling compensates decoherence, we found universal behavior. At intermediate frequencies noise can be compensated or enhanced, depending on the nature of the fluctuators and on the operating point. Our technique can be applied to a larger class of non-gaussian environments.

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