Phase diffusion and charging effects in Josephson junctions
介观与纳米尺度物理
2007-05-23 v1 超导电性
摘要
The supercurrent of a Josephson junction is reduced by phase diffusion. For ultrasmall capacitance junctions the current may be further decreased by Coulomb blockade effects. We calculate the Cooper pair current by means of time-dependent perturbation theory to all orders in the Josephson coupling energy and obtain the current-voltage characteristic in closed form in a range of parameters of experimental interest. The results comprehend phase diffusion of the coherent Josephson current in the classical regime as well as the supercurrent peak due to incoherent Cooper pair tunneling in the strong Coulomb blockade regime.
关键词
引用
@article{arxiv.cond-mat/9801172,
title = {Phase diffusion and charging effects in Josephson junctions},
author = {Hermann Grabert and Gert-Ludwig Ingold and Benjamin Paul},
journal= {arXiv preprint arXiv:cond-mat/9801172},
year = {2007}
}
备注
4 pages, 3 figures, RevTeX