Initial decoherence in solid state qubits.
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.
Falci
G
G
Dipartimento di Metodologie Fisiche e Chimiche, Universitá di Catania, Viale A. Doria 6, 95125 Catania, Italy. gfalci@dmfci.unict.it
D'Arrigo
A
A
Mastellone
A
A
Paladino
E
E