Volume 83, Number 4, August 2008
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||19 August 2008|
Quantum charge diffusion in underdamped Josephson junctions and superconducting nanowires
Université Joseph Fourier, Laboratoire de Physique et de Modélisation des Milieux Condensés, CNRS BP 166, 38042 Grenoble, France, EU
Accepted: 8 July 2008
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.
PACS: 74.78.Na – Mesoscopic and nanoscale systems / 74.50.+r – Tunneling phenomena; point contacts, weak links, Josephson effects / 73.23.Hk – Coulomb blockade; single-electron tunneling
© EPLA, 2008
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