Observation of breathers in Josephson ladders

Details Observation of breathers in Josephson ladders Observation of breathers in Josephson ladders

1999-05-19

arxiv.org/abs/cond-mat/9905277v2

Physics

Condensed Matter

Scientific paper

10.1103/PhysRevLett.84.745

We report on the observation of spatially-localized excitations in a ladder of small Josephson junctions. The excitations are whirling states which persist under a spatially-homogeneous force due to the bias current. These states of the ladder are visualized using a low temperature scanning laser microscopy. We also compute breather solutions with high accuracy in corresponding model equations. The stability analysis of these solutions is used to interpret the measured patterns in the I-V characteristics.

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