Peter Binder

Physikalisches Institut III, Universität
Erlangen-Nürnberg, D-91058 Erlangen 

We generate and observe discrete rotobreathers in Josephson
junction ladders with open boundaries.
Rotobreathers are localized excitations that persist under the
action of a spatially uniform force. We find a rich variety of
stable dynamic states including pure symmetric, pure asymmetric, and
mixed states.  The parameter range where the discrete breathers are
observed in our experiment is limited by retrapping due to
dissipation.