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arXiv 0904.1828math.AP
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Ginzburg-Landau方程的周期开折与均匀化

Periodic unfolding and homogenization for the Ginzburg-Landau Equation

Myrto Sauvageot

摘要:

在$\R^2$的有界区域$Ω$上,研究了一类由两个参数驱动的Ginzburg-Landau方程解$u_{\varepsilon,δ}$的渐近性态:通常的Ginzburg-Landau参数,记为$\varepsilon$,以及由$2\times 2$正定矩阵$x\to A(\frac{x}δ)$构成的域的尺度参数$δ$.字段$\R^2\ni x\to A(x)$属于$W^{2,\infty}$类并且是周期性的。我们表明,对于一个适当的选择的$\varepsilon$的依赖于$δ$,存在一个极限配置$u_\infty\in H^1_g(Ω,S^1)$,这是一个有限的奇点集,是一个弱解的方程的$S^1$值调和函数的几何有关的通常的均匀化矩阵$A^0$。

英文摘要:

We investigate, on a bounded domain $Ω$ of $\R^2$ with fixed $S^1$-valued boundary condition $g$ of degree $d>0$, the asymptotic behaviour of solutions $u_{\varepsilon,δ}$ of a class of Ginzburg-Landau equations driven by two parameter : the usual Ginzburg-Landau parameter, denoted $\varepsilon$, and the scale parameter $δ$ of a geometry provided by a field of $2\times 2$ positive definite matrices $x\to A(\frac{x}δ)$. The field $\R^2\ni x\to A(x)$ is of class $W^{2,\infty}$ and periodic. We show, for a suitable choice of the $\varepsilon$'s depending on $δ$, the existence of a limit configuration $u_\infty\in H^1_g(Ω,S^1)$, which, out of a finite set of singular points, is a weak solution of the equation of $S^1$-valued harmonic functions for the geometry related to the usual homogenized matrix $A^0$.

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