Observation of interactions between two superconducting phase-slip centers

A superconducting microbridge was used as a probe to detect quasiparticle diffusion currents and heating, produced by a phase-slip center (PSC) in a second microbridge. The critical current of the detector is modulated by the voltage V sub PSC across the PSC. This modulation provides a measure of quasiparticle current I sub Q thru the PSC and gives I sub Q = V sub PSC/R and D for low voltages, R sub O being the high-current differential resistance of the PSC.