Decoherence and 1/f Noise in Josephson Qubits
Elisabetta Paladino, Lara Faoro, G. Falci +1 more
We propose and study a model of dephasing due to an environment of bistable fluctuators. We apply our analysis to the decoherence of Josephson qubits, induced by background charges present in the substrate, which are also responsible for the 1/f noise. The discrete nature of the environment leads to a number of new features which are mostly pronounced for slowly moving charges. Far away from the degeneracy this model for the dephasing is solved exactly.
arXiv:cond-mat/0201449•Physical Review Letters•May 20, 2002•326 citations