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Edge Behavior of Two-Dimensional Coulomb Gases Near a Hard Wall

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Abstract

We consider a two-dimensional determinantal Coulomb gas confined by a class of radial external potentials. In the limit of large number of particles, the Coulomb particles tend to accumulate on a compact set S, the support of the equilibrium measure associated with a given external potential. If the particles are forced to be completely confined in a disk \({\mathcal {D}}\) due to a hard-wall constraint on \({\partial }{\mathcal {D}}\subset {\text {Int}}S\), then the equilibrium configuration changes and the equilibrium measure acquires a singular component at the hard wall. We study the local statistics of Coulomb particles in the vicinity of the hard wall and prove that their local correlations are expressed in terms of “Laplace-type” integrals, which appear in the context of truncated unitary matrices in the regime of weak non-unitarity.

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Acknowledgements

The author thanks Nam-Gyu Kang for valuable advice and helpful discussions. This work was partially supported by the KIAS Individual Grant (MG063103) at Korea Institute for Advanced Study and by the National Research Foundation of Korea (NRF) Grant funded by the Korea government (No. 2019R1F1A1058006) and (No. 2019R1A5A1028324).

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  1. Department of Mathematical Sciences, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea

    Seong-Mi Seo

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Communicated by Vadim Gorin.

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Seo, SM. Edge Behavior of Two-Dimensional Coulomb Gases Near a Hard Wall. Ann. Henri Poincaré 23, 2247–2275 (2022). https://doi.org/10.1007/s00023-021-01126-0

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