Current locking in magnetically coupled long Josephson junctions

Critical currents in a system of two magnetically coupled long Josephson ju nctions are studied numerically, analytically, and experimentally. We show that the switching from static to dynamic state of one junction can trigger switching of the other, and this process leads to current locking. A disti nction is made between different critical currents of an individual junctio n depending on the static or dynamic state of the other junction. Good agre ement between the experiment and numerical simulation is found. [S0163-1829 (99)07917-5].