Spatiotemporal effects in long rf-biased Josephson junctions: Chaotic transitions and intermittencies between dynamical attractors

L. E. Guerrero; M. Octavio

doi:10.1103/PhysRevA.40.3371

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Spatiotemporal effects in long rf-biased Josephson junctions: Chaotic transitions and intermittencies between dynamical attractors

L. E. Guerrero, M. Octavio

DOI 10.1103/PhysRevA.40.3371 · Physical Review A

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Abstract

We present an extensive numerical study of a long rf-biased Josephson junction in the presence of an applied magnetic field. We show the great complexity of the system and clarify some of the diverse spatiotemporal relationships that exist. At low values of the rf amplitude the spatial constraint succeeds in exciting an oscillating and localized pattern of solitonlike character. The dynamical response of this excitation as the forcing amplitude is increased allows us to observe three distinct intermittent phenomena: intermittency induced by interior crises, spatiotemporal intermittency between strange attractors, and tangentlike spatiotemporal intermittency. We also analyze at higher rf-bias amplitude a transition to a regime consisting of traveling waves with the spontaneous development of dc voltage which we interpret as being due to spatiotemporal chaos.