Nonequilibrium mesoscopic superconductors in a fluctuational regime

We develop a non-equilibrium Ginzburg-Landau-type theory of the far-from-equilibrium dynamics of superconductors in a fluctuational regime and apply our approach to quantitative description of a superconductor island in a stationary nonequilibrium state. We derive the effective temperature of the nonequilibrium state and find fluctuational contributions to the magnetic susceptibility showing that it becomes a singular function of \sqrt{V-V_c} , where V is the external drive and V_c is its "critical" value at which the nonequilibrium phase transition takes place.