Experimental study of fluxon dynamics in a potential well |
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Authors: | Alexey V Ustinov Norbert Thyssen |
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Affiliation: | (1) Institute of Thin Film and Ion Technology, Research Center (KFA), D-52425 Jülich, Germany |
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Abstract: | Dynamics of a single fluxon in an annular Josephson junction is studied in the presence of an externally applied magnetic
field H. Due to the interaction of the fluxon with the radial field component, the fluxon moves in a potential well which
height is proportional to H. Several spectacular features of fluxon dynamics analogous to the motion of a particle in a washboard
potential are clearly observed experimentally. Periodic revolutions of the fluxon in the junction lead to a potential induced
emission of plasma waves. These waves are indicated by a resonance at a certain fluxon velocity which depends on the junction
length. Good agreement between experiment, theoretical model and numerical simulations is found. |
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