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Observation of breatherlike states in a single Josephson cell
1Physikalisches Institut III, Universität Erlangen-Nürnberg, Erwin-Rommel-Strasse 1, Germany.
Abstract:
We present experimental observation of broken-symmetry states in a superconducting loop with three Josephson junctions. These states are generic for discrete breathers in Josephson ladders. The existence region of the breatherlike states is found to be in good accordance with the theoretical expectations. We observed three different resonant states in the current-voltage characteristics of the broken-symmetry state, as predicted by theory. The experimental dependence of the resonances on the external magnetic field is studied in detail.
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