Noise effect on instabilities and chaotic solutions of a superconducting interferometer

A computer simu1ation of a dc superconducting quantum interference device (dc SQUID) in the case P, 3, Pt. 6.28, and noise parameter I= 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 ef-fect in the simulation is it possible to understand the working mechanism of some practical devices characterized byhigh values of the critical current ...