Journal
JOURNAL OF STATISTICAL PHYSICS
Volume 125, Issue 5-6, Pages 1069-1096Publisher
SPRINGER
DOI: 10.1007/s10955-006-9087-x
Keywords
pattern formation; elasticity; metric; surfaces; differential geometry
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We solve several problems that involve imposing metrics on surfaces. The problem of a strip with a linear metric gradient is formulated in terms of a Lagrangian similar to those used for spin systems. We are able to show that the low energy state of long strips is a twisted helical state like a telephone cord. We then extend the techniques used in this solution to two-dimensional sheets with more general metrics. We find evolution equations and show that when they are not singular, a surface is determined by knowledge of its metric, and the shape of the surface along one line. Finally, we provide numerical evidence by minimizing a suitable energy functional that once these evolution equations become singular, either the surface is not differentiable, or else the metric deviates from the target metric.
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