The dynamical behaviour of a fluxon in a long Josephson junction in the presence of an external microwave field is studied by means of a two dimensional map. The map shows that fluxon oscillations may become chaotic through a sequence of period doubling bifurcations. This chaos appears in the central portion of a subharmonic rf-induced step in the current-voltage characteristic and may be observable in a real junction both as a deformation of the step and as a broadening of the linewidth of the emitted radiation, as the bias point is moved from the edges toward the centre of the step.

PHASE-LOCKING CHAOS IN LONG JOSEPHSON-JUNCTIONS

SALERNO, Mario
1990

Abstract

The dynamical behaviour of a fluxon in a long Josephson junction in the presence of an external microwave field is studied by means of a two dimensional map. The map shows that fluxon oscillations may become chaotic through a sequence of period doubling bifurcations. This chaos appears in the central portion of a subharmonic rf-induced step in the current-voltage characteristic and may be observable in a real junction both as a deformation of the step and as a broadening of the linewidth of the emitted radiation, as the bias point is moved from the edges toward the centre of the step.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11386/3018916
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