Abstract
The existence of compactly supported global minimisers for continuum models of particles interacting through a potential is shown under almost optimal hypotheses. The main assumption on the potential is that it is catastrophic, or not H-stable, which is the complementary assumption to that in classical results on thermodynamic limits in statistical mechanics. The proof is based on a uniform control on the local mass around each point of the support of a global minimiser, together with an estimate on the size of the "gaps" it may have. The class of potentials for which we prove the existence of global minimisers includes power-law potentials and, for some range of parameters, Morse potentials, widely used in applications. We also show that the support of local minimisers is compact under suitable assumptions.
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Communicated by I. Fonseca
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Cañizo, J.A., Carrillo, J.A. & Patacchini, F.S. Existence of Compactly Supported Global Minimisers for the Interaction Energy. Arch Rational Mech Anal 217, 1197–1217 (2015). https://doi.org/10.1007/s00205-015-0852-3
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DOI: https://doi.org/10.1007/s00205-015-0852-3