Se p 20 00 Improved perturbation theory in the vortex liquids state of type II superconductors


We develop an optimized perturbation theory for the Ginzburg Landau description of thermal fluctuations effects in the vortex liquids. Unlike the high temperature expansion which is asymptotic, the optimized expansion is convergent. Radius of convergence on the lowest Landau level is aT = −3 in 2D and aT = −5 in 3D. It allows a systematic calculation of… (More)

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