A study of applied microwaves and quasiparticle injection on the dynamically enhanced supercurrent of a microbridge

We have measured the influence of external excitations on the dynamically enhanced critical current of a superconducting microbridge. In one experiment microwaves were applied to a microbridge and the dynamically enhanced critical current was monitored. In a second experiment, two superconducting microbridges were fabricated closer together than a coherence length. The dynamically enhanced critical current of one microbridge was measured as a function of the current through the second microbridge. In each experiment the dynamically enhanced critical current was found to be changed. A qualitative explanation of this effect is discussed.