*Preprint*

**Inserted:** 21 sep 2016

**Last Updated:** 21 sep 2016

**Year:** 2016

**Abstract:**

For general dimension $d$ we prove the equidistribution of energy at the micro-scale in $\mathbb R^d$, for the optimal point configurations appearing in Coulomb gases. At the microscopic scale, i.e. after blow-up at the scale corresponding to the interparticle distance, \cm{in the case of Coulomb gases} we show that the energy concentration is precisely determined by the macroscopic density of points, independently of the scale. This uses the ``jellium energy'' which was previously shown to control the next-order term in the large particle number asymptotics of the minimum energy. As a corollary we obtain the hyperuniformity of optimal point configurations for Coulomb gases, extending previous results valid only for $2$-dimensional log-gases. \cm{For Riesz gases with interaction potentials $g(x)=

x

^{-s}, s\in[\min\{0,d-2\},d[$ (where $g(x):=-\log

x

$ for $s=0$), we prove the same equidistribution result under an extra hypothesis on the decay of the localized energy, which we conjecture to hold for minimizing configurations. In this case we use the Caffarelli-Silvestre description of the non-local fractional Laplacians in $\mathbb R^d$ to localize the problem.}

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