4.4 Article

Local and global minimizers for a variational energy involving a fractional norm

Journal

ANNALI DI MATEMATICA PURA ED APPLICATA
Volume 192, Issue 4, Pages 673-718

Publisher

SPRINGER HEIDELBERG
DOI: 10.1007/s10231-011-0243-9

Keywords

Phase transitions; Nonlocal energy; Gagliardo norm; Fractional Laplacian

Funding

  1. Istituto Nazionale di Alta Matematica F. Severi (Indam)
  2. ERC [207573, 277749]
  3. National Science Foundation (NSF) [0701037]
  4. FIRB
  5. Direct For Mathematical & Physical Scien
  6. Division Of Mathematical Sciences [0701037] Funding Source: National Science Foundation

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We study existence, uniqueness, and other geometric properties of the minimizers of the energy functional where denotes the total contribution from Omega in the H (s) norm of u and W is a double-well potential. We also deal with the solutions of the related fractional elliptic Allen-Cahn equation on the entire space . The results collected here will also be useful for forthcoming papers, where the second and the third author will study the I-convergence and the density estimates for level sets of minimizers.

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