Silent Phase Qubit Based on d-Wave Josephson Junctions

Details Silent Phase Qubit Based on d-Wave Josephson Junctions Silent Phase Qubit Based on d-Wave Josephson Junctions

2003-10-09

arxiv.org/abs/cond-mat/0310224v1

Phys. Rev. B 71, 064516 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 pages, 3 figures

Scientific paper

10.1103/PhysRevB.71.064516

We report on design and fabrication of a new type of flux qubit that capitalizes on intrinsic properties of submicron YBCO grain boundary junctions. The operating point is protected from the fluctuations of the external fields, already on the classical level; the effects of external perturbations are absent, to the second or third order, depending on the character of the coupling. We propose an experiment to observe quantum tunneling and Rabi oscillations in the qubit. Estimate of the decoherence due to fluctuations of the external flux is presented.

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