THE DYNAMICAL RESPONSE OF A 3-JUNCTION NETWORK .2. VORTICES

The phase diagram of a triangular network of overdamped Josephson Junc tions driven by independent current drives is studied in terms of vort ices. There are no vortices in the fixed-point region, while in the pi g Arnold tongue, vortices appear in sequences which repeat themselves every q vortices. Precisely q - p vortices in each sequence are inject ed by the non-uniform drive. We explicitly identify the vortex sequenc e at infinity and find that for large input currents, all reals betwee n 1 and 1/2 can be given a unique binary representation in terms of vo rtices.