Subharmonic locking in Josephson weak links
G. W. Frank, A. S. Deakin, M. A. H. Nerenberg, James A. Blackburn
DOI 10.1103/PhysRevB.35.3138 · Physical Review B
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Abstract
After some controversy, it has been shown that subharmonic voltage (phase) locking does not exist in the ac-driven overdamped resistively shunted junction model of a Josephson weak link. We predict that for a very similar system of a pair of coupled links without ac drive, mutual subharmonic locking can take place. We demonstrate our thesis both by a careful numerical simulation of the exact equations of the model and by a second-order analytical perturbation calculation based on the coupling parameter.
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