Decoherence of the Superconducting Persistent Current Qubit

Details Decoherence of the Superconducting Persistent Current Qubit Decoherence of the Superconducting Persistent Current Qubit

1999-10-05

arxiv.org/abs/cond-mat/9910062v3

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 1 figure, Latex/revtex.To appear in proceedings of the NATO-ASI on "Quantum Mesoscopic Phenomena and Mesoscopic Devi

Scientific paper

Decoherence of a solid state based qubit can be caused by coupling to
microscopic degrees of freedom in the solid. We lay out a simple theory and use
it to estimate decoherence for a recently proposed superconducting persistent
current design. All considered sources of decoherence are found to be quite
weak, leading to a high quality factor for this qubit.

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