SMALL INDUCTANCE APPROXIMATION OF PHASE-LOCKING IN MULTIJUNCTION SQUIDS

We present a theoretical analysis of the dynamics of multijunction sup erconducting quantum interference devices (SQUIDs). The small inductan ce approximation allows to get analytical expressions for the Josephso n phases and voltages, taking into account a finite value of the induc tance of the SQUID cells. Contrary to most theoretical investigations which exploited the first-harmonic approximation approach, our results describe the behavior of the circuit for small values of the Josephso n frequency as well. Analytical results have been shown to be in a goo d agreement with numerical simulations. (C) 1998 American Institute of Physics.