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PoweringPersistentCurrents< Superconductivity.Topology | Index The circuit looks like this:  The power supply produces a slow ramping voltage {$V(t) = V_0 +\beta t$} and, apart from an initial transient, the two currents are {$$i(t) = \frac 1{R+R_s} (V_0+(t-\tau_L)\beta)$$} and |