Complex dynamics of mode-locking in a Josephson junction network

Mode-locking phenomena in a disordered Josephson junction network driven by a periodic current pulse are studied using a numerical simulation. For a ladder type of the network structure with disorder, the dynamics of local voltages and the voltage-voltage correlation are investigated in a regime between the mode-locking and unlocking states. We clarify the relationship between locking-unlocking processes and the phase pinning due to disorder.