$Γ$-convergence for nonlocal phase transitions

Details $Γ$-convergence for nonlocal phase transitions $Γ$-convergence for nonlocal phase transitions

2010-07-10

arxiv.org/abs/1007.1725v3

Mathematics

Analysis of PDEs

Scientific paper

We discuss the $\Gamma$-convergence, under the appropriate scaling, of the energy functional $$ \|u\|_{H^s(\Omega)}^2+\int_\Omega W(u)dx,$$ with $s \in (0,1)$, where $\|u\|_{H^s(\Omega)}$ denotes the total contribution from $\Omega$ in the $H^s$ norm of $u$, and $W$ is a double-well potential. When $s\in [1/2,\,1)$, we show that the energy $\Gamma$-converges to the classical minimal surface functional -- while, when $s\in(0,\,1/2)$, it is easy to see that the functional $\Gamma$-converges to the nonlocal minimal surface functional.

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