Quantum charge diffusion in underdamped Josephson junctions and superconducting nanowires

Details Quantum charge diffusion in underdamped Josephson junctions and superconducting nanowires Quantum charge diffusion in underdamped Josephson junctions and superconducting nanowires

2007-06-15

arxiv.org/abs/0706.2260v2

Europhys. Lett. 83, 47012 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 2 figures, replaced with published version

Scientific paper

10.1209/0295-5075/83/47012

The effect of quantum fluctuations on the current-voltage characteristics of Josephson junctions and superconducting nanowires is studied in the underdamped limit. Quantum fluctuations induce transitions between a Coulomb--blockade and a supercurrent branch, and can significantly modify the shape of current-voltage characteristics in the case of a highly resistive environment. Owing to the phase-charge duality, our results can be directly extended to the opposite overdamped limit.

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