The resistive state in a superconducting wire: Bifurcation from the normal state

Details The resistive state in a superconducting wire: Bifurcation from the normal state The resistive state in a superconducting wire: Bifurcation from the normal state

2007-12-20

arxiv.org/abs/0712.3531v1

Physics

Mathematical Physics

Scientific paper

10.1007/s00205-008-0188-3

We study formally and rigorously the bifurcation to steady and time-periodic states in a model for a thin superconducting wire in the presence of an imposed current. Exploiting the PT-symmetry of the equations at both the linearized and nonlinear levels, and taking advantage of the collision of real eigenvalues leading to complex spectrum, we obtain explicit asymptotic formulas for the stationary solutions, for the amplitude and period of the bifurcating periodic solutions and for the location of their zeros or "phase slip centers" as they are known in the physics literature. In so doing, we construct a center manifold for the flow and give a complete description of the associated finite-dimensional dynamics.

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