Thermal capacity estimates on the Allen-Cahn equation

We consider the Allen-Cahn equation in a well-known scaling regime which gives motion by mean curvature. A well-known transformation of this PDE, using its standing wave, yields a PDE the solution of which is approximately the distance function to an interface moving by mean curvature. We give bound...

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Bibliographic Details
Published in:Transactions of the American Mathematical Society 1999-06, Vol.351 (6), p.2553-2567
Main Authors: Sowers, Richard B., Wu, Jang-Mei
Format: Article
Language:English
Subjects:
Brownian motion
College mathematics
Curvature
Differential equations
Geometric analysis
Markov processes
Mathematical functions
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Summary:We consider the Allen-Cahn equation in a well-known scaling regime which gives motion by mean curvature. A well-known transformation of this PDE, using its standing wave, yields a PDE the solution of which is approximately the distance function to an interface moving by mean curvature. We give bounds on this last fact in terms of thermal capacity. Our techniques hinge upon the analysis of a certain semimartingale associated with a certain PDE (the PDE for the approximate distance function) and an analogue of some results by Bañuelos and Øksendal relating lifetimes of diffusions to exterior capacities.
ISSN:0002-9947
1088-6850
DOI:10.1090/S0002-9947-99-02399-5