Phys. Rev. Lett. 88, 228304 (2002) [4 pages]Decoherence and 1/f Noise in Josephson QubitsReceived 24 January 2002; published 20 May 2002 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. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.88.228304
DOI:
10.1103/PhysRevLett.88.228304
PACS:
85.25.Cp, 03.65.Yz, 73.23.-b
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