Physics & Computer Science
The oscillations of two resistively coupled Josephson junctions biased only by a single dc current source are shown to lock harmonically in a 1:2 mode over a significant range of bias current, even when the junctions are identical. The dependence of this locking on both junction and coupling parameters is examined, and it is found that, for this particular two-junction configuration, 1:1 locking can never occur, and also that a minimum coupling coefficient is needed to support harmonic locking. Some issues related to subharmonic locking are also discussed.
Blackburn, James A.; Grønbech-Jensen, Niels; and Smith, H.J.T., "Harmonic Synchronization in Resistively Coupled Josephson Junctions" (1994). Physics and Computer Science Faculty Publications. 59.