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Initial decoherence in solid state qubits

G. Falci, A. D'Arrigo, A. Mastellone, E. Paladino

cond-mat.mes-hallarXiv:cond-mat/0409522

Abstract

We study decoherence due to low frequency noise in Josephson qubits. Non-Markovian classical noise due to switching impurities determines inhomogeneous broadening of the signal. The theory is extended to include effects of high-frequency quantum noise, due to impurities or to the electromagnetic environment. The interplay of slow noise with intrinsically non-gaussian noise sources may explain the rich physics observed in the spectroscopy and in the dynamics of charge based devices.

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