A nonlocal isoperimetric problem with dipolar repulsion

Muratov, C.B.; Simon, T.M.

Research article (journal) | Peer reviewed

Abstract

We study a geometric variational problem for sets in the plane in which the perimeter and a regularized dipolar interaction compete under a mass constraint. In contrast to previously studied nonlocal isoperimetric problems, here the nonlocal term asymptotically localizes and contributes to the perimeter term to leading order. We establish existence of generalized minimizers for all values of the dipolar strength, mass and regularization cutoff and give conditions for existence of classical minimizers. For subcritical dipolar strengths we prove that the limiting functional is a renormalized perimeter and that for small cutoff lengths all mass-constrained minimizers are disks. For critical dipolar strength, we identify the next-order Γ" role="presentation" style="box-sizing: inherit; display: inline-block; line-height: normal; word-spacing: normal; overflow-wrap: normal; text-wrap: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border-width: 0px; border-style: initial; position: relative;">Γ-limit when sending the cutoff length to zero and prove that with a slight modification of the dipolar kernel there exist masses for which classical minimizers are not disks.

Details about the publication

JournalCommunications in Mathematical Physics (Commun. Math. Phys.)
Volume372
Page range1059-1115
StatusPublished
Release year2019
Language in which the publication is writtenEnglish
DOI10.1007/s00220-019-03455-y
Keywordsgeometric variational problems; mathematical physics

Authors from the University of Münster

Simon, Theresa
Juniorprofessorship of Applied Mathematics (Prof. Simon)