Explicit minimisers for anisotropic Coulomb energies in 3D

Joan Mateu, Maria Giovanna Mora*, Luca Rondi, Lucia Scardia, Joan Verdera

*Corresponding author for this work

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Abstract

In this paper we consider a general class of anisotropic energies in three dimensions and give a complete characterisation of their minimisers. We show that, depending on the Fourier transform of the interaction potential, the minimiser is either the normalised characteristic function of an ellipsoid or a measure supported on a two-dimensional ellipse. In particular, it is always an ellipsoid if the transform is strictly positive, while when the Fourier transform is degenerate both cases can occur. Finally, we show an explicit example where loss of dimensionality of the minimiser does occur.
Original languageEnglish
Article number109333
JournalAdvances in Mathematics
Volume434
Early online date6 Oct 2023
DOIs
Publication statusPublished - 1 Dec 2023

Keywords

  • Anisotropic interaction
  • Coulomb potential
  • Nonlocal energy
  • Potential theory

ASJC Scopus subject areas

  • Mathematics(all)

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