Observation of a New Fluxon Resonant Mechanism in Annular Josephson Tunnel Structures

Abstract

A novel dynamical state has been observed in the dynamics of a perdurbed sine-Gordon system. This resonant state, has been experimentally observed as a singularity in the dc current voltage characteristic of an annular Josephson tunnel junction, excited in the presence of a magnetic field. With this respect, it can be assimilated to self-resonances known as Fiske steps. Differently from these, however, we demonstrate, on the basis of numerical simulations, that its detailed dynamics involves rotating fluxon pairs, a mechanism associated, so far, to self-resonances known as zero-field steps.

4 pages, 2 figures, submitted to Physical Review Letters

References in corpus (2)

• Zurek-Kibble domain structures: The Dynamics of Spontaneous Vortex formation in Annular Josephson Tunnel Junctions
• Quantum dissociation of a vortex-antivortex pair in a long Josephson junction

Cited by in corpus (5)

• The ac Driven Annular Josephson Junctions: The Missing Steps
• Resonance phenomena in the annular array of underdamped Josephson junctions
• The Eccentric Collective BFKL Pomeron
• The emergence of atomic semifluxons in optical Josephson junctions
• Closed form solution for the self-resonances in a short Josephson junction