Flux bias-controlled chaos and extreme multistability in SQUID oscillators

摘要

The dynamics of a single SQUID oscillator is revisited and a systematic studyof the flux bias effects is presented. The majority of previous works havefocused on the influence of the applied alternating field. Here we investigatethe role of an additional constant term in the external force driving a SQUIDwith experimentally relevant parameters, and we reveal a plethora of complexbifurcation scenarios and chaos. The flux bias, which serves as yet anothercontrol parameter of the SQUID dynamics and has been largely ignored in priorworks, is solely responsible for the enrichment of the SQUID's dynamicbehavior.