Quantum fluctuations in the tunneling between superconductors

Abstract

Quantum fluctuations in a microscopic model of a Josephson junction including dissipative effects, parametrized by =2e2R with R the resistance, are discussed. It is shown that the parameter space divides sharply into two regions: One in which scaling trajectories lead to a vanishing mean tunneling rate at T=0 and the other in which they do not. © 1982 The American Physical Society.