Discrete breathers in dc biased Josephson-junction arrays

Abstract

We propose a method to excite and detect a rotor localized mode (rotobreather) in a Josephson-junction array biased by dc currents. In our numerical studies of the dynamics we have used experimentally realizable parameters and included self-inductances. We have uncovered two families of rotobreathers. Both types are stable under thermal fluctuations and exist for a broad range of array parameters and sizes including arrays as small as a single plaquette. We suggest a single Josephson-junction plaquette as an ideal system to experimentally investigate these solutions.

5 pages, 5 figure, to appear June 1, 1999 in PRB

References in corpus (2)

• Intrinsically localized chaos in discrete nonlinear extended systems
• Spatiotemporal dynamics of discrete sine-Gordon lattices with sinusoidal couplings

Cited by in corpus (5)

• Discrete Breathers in Josephson Ladders
• Resonant plasmon scattering by discrete breathers in Josephson junction ladders
• Breathers in a single plaquette of Josephson junctions: existence, stability and resonances
• Chaotic transients in the switching of roto-breathers
• Vortex Fractionalization in a Josephson Ladder