Superconducting Phase Slip Oscillations on Demand

Remarkable properties of phase slip centers (PSCs) have direct analog with weakly coupled superconductors (Josephson contacts, SNS-junctions, ScS systems, etc.). In typical 1-D wire models of these types, PSC oscillations arise in the geometric wire centers or, if more than one PSC, symmetrically to this center location. We add weak spots in the model, which shift the position of the PSCs away from the symmetric location in a degree dependent on the imperfection’s character, by taking into account enhanced phonon feedback onto the Cooper-pair/normal metal system of the wire which generates these phonons. The inclusion of this effect into the time-dependent Ginzburg-Landau (TDGL) system of equations requires an additional function and corresponding equation in the TDGL system. Interestingly, the system finds there is a competition between the induced weak points and symmetry-induced locations. Thus using our approach the PSCs can be generated on demand and provides the opportunity to initiate PSCs at the required time and required place in the wire without changing its biasing properties with high accuracy theoretical modeling.