Fractal structure of subharmonic steps in a Josephson junction: An analog computer calculation - Alstrom, P.; Jensen, M.H.; Levinsen, M.T. (Elsevier)
We have studied the ac and dc driven Josephson junction on an analog computer. A multitude of subharmonic steps are observed. At the critical line where hysteresis sets in the steps form a complete devil's staircase with a fractal dimension D ~0.87 and a decay exponent δ ~ 3 for the 1/Q substeps.
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