Calculus of Variations and Geometric Measure Theory
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A. Rueland - A. Tribuzio

On the Energy Scaling Behaviour of a Singularly Perturbed Tartar Square

created by tribuzio on 20 Apr 2021

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Inserted: 20 apr 2021
Last Updated: 20 apr 2021

Year: 2021

Abstract:

In this article we derive an (almost) optimal scaling law for a singular perturbation problem associated with the Tartar square. Our upper bound quantifies the well-known construction which is used in the literature to prove flexibility of the Tartar square in the sense of flexibility of approximate solutions to the differential inclusion. The main novelty of our article is the derivation of an (up to logarithmic powers matching) ansatz free lower bound which relies on a bootstrap argument in Fourier space and is related to a quantification of the interaction of a nonlinearity and a negative Sobolev space in the form of "a chain rule in a negative Sobolev space". Both the lower and the upper bound arguments give evidence of the involved "infinite order of lamination".

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