EDP Sciences Journals List
Free access article

Issue ESAIM: PS
Volume 2, 1998
Page(s) 123 - 134
DOI 10.1051/ps:1998104

ESAIM: P&S, 1998, Vol. 2, pp. 123-134
DOI: 10.1051/ps:1998104

Large deviations from the circular law

Gérard Ben Arous1 and Ofer Zeitouni2

1  (Gerard.Benarous@epfl.ch) 
2  (zeitouni@ee.technion.ac.il)


Abstract
We prove a full large deviations principle, in the scale N2, for the empirical measure of the eigenvalues of an N x N (non self-adjoint) matrix composed of i.i.d. zero mean random variables with variance N-1. The (good) rate function which governs this rate function possesses as unique minimizer the circular law, providing an alternative proof of convergence to the latter. The techniques are related to recent work by Ben Arous and Guionnet, who treat the self-adjoint case. A crucial role is played by precise determinant computations due to Edelman and to Lehmann and Sommers.


Résumé
On montre un principe de grandes déviations, en échelle N2, pour la loi empirique des valeurs propres d'une matrice de taille N x N composée de variables gaussiennes indépendantes ayant une moyenne nulle et une variance N-1. La (bonne) fonction de taux qui contrôle ce principe de grandes déviations a comme minimisante unique la loi circulaire. Les techniques sont reliées à un travail récent de Ben Arous et Guionnet, qui ont traité le cas auto-adjoint. Un rôle important est joué par des calculs précis de déterminants, faits par Edelman et par Lehmann et Sommers.


Key words: Large deviations / circular law / non commutative entropy.


© EDP Sciences, SMAI 1998


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