title: Penetration of dynamic localized states in dc-driven Josephson junction ladders by discrete jumps.
abstract: We give a theoretical study of unusual resistive (dynamic) localized states in anisotropic Josephson junction ladders, driven by a dc current at one edge. These states comprise nonlinearly coupled rotating Josephson phases in adjacent cells, and with increasing current they are found to expand into neighboring cells by a sequence of sudden jumps. We argue that the jumps arise from instabilities in the ladder's superconducting part, and our analytic expressions for the peculiar voltage (rotational frequency) ratios and I-V curves are in very good agreement with direct numerical simulations.
authors.affiliation: Max Planck Institute for the Physics of Complex Systems, D-01187 Dresden, Germany.
authors.forename: M V
authors.initials: MV
authors.lastname: Fistul
authors.forename: J B
authors.initials: JB
authors.lastname: Page