Analysis and application to superconducting quantum interference devices of double barrier superconducting junctions

We have calculated the do Josephson current through double barrier supercon ducting junctions. Using a formula derived by Furusaki and Tsukada [Solid S tate Commun. 78, 299 (1991)], we have numerically estimated the current-pha se relationship from the probability amplitude of the Andreev reflections i n the junctions, and also discussed the resonant phenomena of quasiparticle s. Moreover, using the obtained current-phase relationship, we have analyze d the characteristics of superconducting quantum interference devices conta ining double barrier superconducting junctions. (C) 2000 American Institute of Physics. [S0021-8979(00)02423-3].