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High efficiency deterministic Josephson Vortex Ratchet

M. Beck·E. Goldobin·M. Neuhaus·M. Siegel·R. Kleiner·D. Koelle
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Abstract

We investigate experimentally a Josephson vortex ratchet -- a fluxon in an asymmetric periodic potential driven by a deterministic force with zero time average. The highly asymmetric periodic potential is created in an underdamped annular long Josephson junction by means of a current injector providing efficiency of the device up to 91%. We measured the ratchet effect for driving forces with different spectral content. For monochromatic high-frequency drive the rectified voltage becomes quantized. At high driving frequencies we also observe chaos, sub-harmonic dynamics and voltage reversal due to the inertial mass of a fluxon.

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M. Beck, E. Goldobin, M. Neuhaus, M. Siegel, R. Kleiner, D. Koelle. 2005-06-29. High efficiency deterministic Josephson Vortex Ratchet. https://doi.org/10.1103/physrevlett.95.090603

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