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arXiv · 2507.11054

$Γ$-convergence for nonlocal phase transitions involving the $H^{1/2}$ norm

Tim Heilmann
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Abstract

We study functionals \begin{equation*} F_\varepsilon (u) := λ_\varepsilon \int_ΩW(u) \, dx + \varepsilon \|u\|_{H^{1/2}}^2 \end{equation*} for a double well potential $W$ and the Gagliardo seminorm $\|\cdot\|_{H^{1/2}}$ when $\varepsilon \ln(λ_\varepsilon) \rightarrow k$ as $\varepsilon \rightarrow 0^+$ and show compactness in the space of $BV$ functions on $Ω$ and the $Γ$-convergence to the classical surface tension functional.

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Tim Heilmann. 2025-11-05. $Γ$-convergence for nonlocal phase transitions involving the $H^{1/2}$ norm. https://arxiv.org/abs/2507.11054

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