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arXiv 1105.4565math.APmath.DG
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二维系统的边界反问题

Inverse Boundary Problems for Systems in Two Dimensions

Pierre Albin, Colin Guillarmou, Leo Tzou, Gunther Uhlmann

摘要:

本文证明了具有$\mathbb{C}$边界或区域的有向紧致曲面上的椭圆型方程组在边界处的柯西数据对规范系数的识别。在几何背景下,我们固定一个有边界的Riemann曲面,考虑作用在Clifford丛截面上的Dirac-type算子+位势和作用在Hermitian丛截面上的联络Laplacian算子+位势(即具有外部Yang-Mills场的Schrödinger Laplacian算子).在任何一种情况下,我们表明,柯西数据确定的连接和潜在的一个自然的规范变换:共轭由一个自同态的丛,这是在边界处的身份。对于$\mathbb{C}$的区域,我们从一阶椭圆方程组边界上的柯西数据恢复零阶项。

英文摘要:

We prove identification of coefficients up to gauge by Cauchy data at the boundary for elliptic systems on oriented compact surfaces with boundary or domains of $\mathbb{C}$. In the geometric setting, we fix a Riemann surface with boundary, and consider both a Dirac-type operator plus potential acting on sections of a Clifford bundle and a connection Laplacian plus potential (i.e. Schrödinger Laplacian with external Yang-Mills field) acting on sections of a Hermitian bundle. In either case we show that the Cauchy data determines both the connection and the potential up to a natural gauge transformation: conjugation by an endomorphism of the bundle which is the identity at the boundary. For domains of $\mathbb{C}$, we recover zeroth order terms up to gauge from Cauchy data at the boundary in first order elliptic systems.

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