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Noise effect on instabilities and chaotic solutions of a superconducting interferometer

R. Leoni, P. Carelli, V. Foglietti

DOI 10.1103/PhysRevB.35.400 · Physical Review B

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Abstract

A computer simulation of a dc superconducting quantum interference device (dc SQUID) in the case βc=3, βL=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.

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