ANTIPHASE LOCKING IN A 2-DIMENSIONAL JOSEPHSON-JUNCTION ARRAY

We consider theoretically phase locking in a simple two-dimensional Jo sephson junction array consisting of two loops coupled via a joint lin e transverse to the bias current. Ring inductances are supposed to be small, and special emphasis is taken on the influence of external flux . It is shown that in the stable oscillation regime both cells oscilla te with a phase shift equal to pi (i.e., antiphase). This result may e xplain the low radiation output obtained so far in two-dimensional Jos ephson junction arrays experimentally. (C) 1996 American Institute of Physics.