Chaotic intermittency between soliton dynamic states has been found in a perturbed sine-Gordon system in the absence of an external ac driving term. The system is a model of a long Josephson oscillator with constant loss and bias current in an external magnetic field. The results predict the existence of a current step between the first two Fiske steps in the current-voltage characteristic. A simple probability model demonstrates an asymmetry in the statistical nature of the switching in the two directions.
Bibliographical noteCopyright (1983) by the American Physical Society.
Sørensen, M. P., Arley, N., Christiansen, P. L., Parmentier, R. D., & Skovgaard, O. (1983). Intermittent Switching between Soliton Dynamic States in a Perturbed Sine-Gordon Model. Physical Review Letters, 51(20), 1919-1922. https://doi.org/10.1103/PhysRevLett.51.1919