Observation of Breathers in Josephson Ladders
P. BinderPhysikalisches Institut III, Universitat Erlangen, E. -Rommel-Strasse 1, D-91058 Erlangen, GermanyDmytro AbraimovPhysikalisches Institut III, Universität Erlangen, E.-Rommel-Straße 1, D-91058 Erlangen, GermanyA. V. UstinovPhysikalisches Institut III, Universität Erlangen, E.-Rommel-Straße 1, D-91058 Erlangen, GermanySergej FlachMax-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Straße 38, D-01187 Dresden, GermanyYaroslav ZolotaryukMax-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Straße 38, D-01187 Dresden, Germany
2000en
ABI
Annotatsiya
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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