Novel results obtained by modeling of dynamic processes in superconductors: phase-slip centers as cooling engines

Based on the time-dependent Ginzburg-Landau system of equations and finite element modeling, we present novel results related with physics of phaseslippage in superconducting wires surrounded by a non-superconductive environment. These results are obtained within our previously reported approach related to superconducting rings and superconductive gravitational wave detector transducers. It is shown that the phase-slip centers (PSCs) can be effective in originating not only positive but also negative thermal fluxes. With appropriate design utilizing thermal diodes, PSCs can serve as cryocooling engines. Operating at T ∼ 1 K cryostat coldfinger, they can achieve sub-Kelvin temperatures without using ³He.