Self-Consistent Nonequilibrium Description of Phase-Slip States in Superconducting Filaments

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Abstract
Inhomogeneous dissipative states found in a current-driven superconducting filament have been investigated with explicit allowance for depairing and coupling between pairs and quasiparticles off equilibrium. The resulting charge imbalance is insensitive to the gapless approximation used over a wide range of parameters; it can induce additional synchronized phase-slip centers, and leads to novel effects related to a mismatch between the core and the wings of each phase-slip center if local equilibrium cannot be maintained.