2004/04/29 by Niels Gronbech-Jensen, Niels Grønbech‐Jensen, M. Cirillo +1
Computer Science · Physics and Astronomy · #Nonlinear Dynamics and Pattern Formation #Quantum and electron transport phenomena #cond-mat.stat-mech #cond-mat.supr-con #stochastic dynamics and bifurcation
paper · pdf · doi:10.1103/physrevb.70.214507
published as Physical Review B Vol.70, 214507 (2004) · 12 pages + 8 figures
arxiv created 2004/04/29 · openalex publication_date 2004/12/03 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We investigate theoretically the thermal escape behavior of trapped magnetic fluxons in long annular Josephson junctions in dc magnetic fields, and perturbed by a probing ac current. The study is motivated by recently published experimental data that show multipeaked escape distributions for increasing bias current in the extreme low temperature regime when the system is perturbed by an ac current. We demonstrate that the observed behavior of multipeaked escape distributions can be reproduced and predicted in the entirely classical, thermally driven sine-Gordon model, which is widely accepted as accurately describing the experimental system. We interpret the observed multipeaked distributions as being directly induced by dynamical resonances between the applied ac perturbation and the natural oscillation frequency of a trapped fluxon.