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arXiv 2403.11286math-phmath.APmath.MPmath.SP
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关于角点的 Ginzburg-Landau 能量

On the Ginzburg-Landau Energy of Corners

Michele Correggi, Emanuela L. Giacomelli, Ayman Kachmar

AI总结:

本文研究了描述超导偏移和表面超导的两个有效模型之间的联系,证明了模型转变相对于磁场强度的连续性,推导出阈值处极小值的存在性,并反驳了关于角点能量角度依赖性的猜想。

摘要:

众所周知,超导样品的几何形状会影响强外加磁场下表面超导的分布。例如,角点的存在会通过类扇形区域中的有效模型来描述几何项。我们研究了文献 \cite{BNF} 和 \cite{CG2} 中分别引入的、用于描述超导偏移和表面超导的两个有效模型之间的联系。我们证明了这两个模型之间的转变相对于磁场强度是连续的,并且作为副产品,我们推导出了这两个有效问题在阈值处极小值的存在性。此外,作为推论,我们反驳了文献 \cite{CG2} 中提出的关于角点能量对接近阈值处角度依赖性的猜想。

英文摘要:

It is a well known fact that the geometry of a superconducting sample influences the distribution of the surface superconductivity for strong applied magnetic fields. For instance, the presence of corners induces geometric terms described through effective models in sector-like regions. We study the connection between two effective models for the offset of superconductivity and for surface superconductivity introduced in \cite{BNF} and \cite{CG2}, respectively. We prove that the transition between the two models is continuous with respect to the magnetic field strength, and, as a byproduct, we deduce the existence of a minimizer at the threshold for both effective problems. Furthermore, as a consequence, we disprove a conjecture stated in \cite{CG2} concerning the dependence of the corner energy on the angle close to the threshold.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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