Current locking in magnetically coupled long Josephson junctions

Critical currents in a system of two magnetically coupled long Josephson junctions 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 distinction is made between different critical currents of an individual junction depending on the static or dynamic state of the other junction. Good agreement between the experiment and numerical simulation is found.