Optimizing the speed of a Josephson junction

摘要

We review the application of dynamical mean-field theory to Josephsonjunctions and study how to maximize the characteristic voltage IcRn whichdetermines the width of a rapid single flux quantum pulse, and thereby theoperating speed in digital electronics. We study a wide class of junctionsranging from SNS, SCmS (where Cm stands for correlated metal), SINIS (where theinsulating layer is formed from a screened dipole layer), and SNSNS structures.Our review is focused on a survey of the physical results; the formalism hasbeen developed elsewhere.