Layer Potential Techniques for the Narrow Escape Problem

Details Layer Potential Techniques for the Narrow Escape Problem Layer Potential Techniques for the Narrow Escape Problem

2010-03-11

arxiv.org/abs/1003.2275v1

Mathematics

Analysis of PDEs

19 pages

Scientific paper

The narrow escape problem consists of deriving the asymptotic expansion of the solution of a drift-diffusion equation with the Dirichlet boundary condition on a small absorbing part of the boundary and the Neumann boundary condition on the remaining reflecting boundaries. Using layer potential techniques, we rigorously find high-order asymptotic expansions of such solutions. We explicitly show the nonlinear interaction of many small absorbing targets. Based on the asymptotic theory for eigenvalue problems developed in \cite{book}, we also construct high-order asymptotic formulas for eigenvalues of the Laplace and the drifted Laplace operators for mixed boundary conditions on large and small pieces of the boundary.

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