A computer simulation of a dc superconducting quantum interference device (dc SQUID) in the case ${\beta }_c$=3, ${\beta }_L$=6.28, and noise parameter Γ=0.01 is performed. The main difference with respect to the case of noiseless behavior is the disappearing and/or mixing of some solutions of the differential equations describing the time evolution of the system. Only by including the noise effect in the simulation is it possible to understand the working mechanism of some practical devices characterized by high values of the critical current and inductance.

• Received 7 February 1986

DOI:https://doi.org/10.1103/PhysRevB.35.400