Dynamics of vortices in Ginzburg-Landau theories with applications to superconductivity.

*(English)*Zbl 0814.34039Summary: We study the dynamics of vortices in time-dependent Ginzburg-Landau theories in the asymptotic limit when the vortex core size is much smaller than the inter-vortex distance. We derive reduced systems of ODEs governing the evolution of these vortices. We then extend these to study the dynamics of vortices in extremely type-II superconductors. Dynamics of vortex lines is also considered. For the simple Ginzburg-Landau equation without the magnetic field, we find that the vortices are stationary in the usual diffusive scaling, and obey remarkably simple dynamic laws when time is speeded up by a logarithmic factor. For columnar vortices in superconductors, we find a similar dynamic law with a potential which is screened by the current. For curved vortex lines in superconductors, we find that the vortex lines move in the direction of the normal with a speed proportional to the curvature. Comparisons are made with the previous results of John Neu.

##### MSC:

34E05 | Asymptotic expansions of solutions to ordinary differential equations |

82D55 | Statistical mechanics of superconductors |

##### Keywords:

dynamics of vortices; time-dependent Ginzburg-Landau theories; asymptotic limit; type-II superconductors
Full Text:
DOI

##### References:

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