| HAL : hal-00490516, version 5 |
| arXiv : 1006.1713 |
| DOI : 10.1007/s00220-011-1331-9 |
| Fiche détaillée | Récupérer au format |
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| Communications in Mathematical Physics 307, 2 (2011) 513-560 |
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| Versions disponibles : | v1 (09-06-2010) | v2 (11-06-2010) | v3 (03-05-2011) | v4 (24-08-2011) | v5 (14-10-2011) |
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| Spectrum of non-Hermitian heavy tailed random matrices |
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| Charles Bordenave 1Pietro Caputo 2 |
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| (04/09/2011) |
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| Let (X_{jk})_{j,k>=1} be i.i.d. complex random variables such that |X_{jk}| is in the domain of attraction of an alpha-stable law, with 0< alpha <2. Our main result is a heavy tailed counterpart of Girko's circular law. Namely, under some additional smoothness assumptions on the law of X_{jk}, we prove that there exists a deterministic sequence a_n ~ n^{1/alpha} and a probability measure mu_alpha on C depending only on alpha such that with probability one, the empirical distribution of the eigenvalues of the rescaled matrix a_n^{-1} (X_{jk})_{1<=j,k<=n} converges weakly to mu_alpha as n tends to infinity. Our approach combines Aldous & Steele's objective method with Girko's Hermitization using logarithmic potentials. The underlying limiting object is defined on a bipartized version of Aldous' Poisson Weighted Infinite Tree. Recursive relations on the tree provide some properties of mu_alpha. In contrast with the Hermitian case, we find that mu_alpha is not heavy tailed. |
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| 1 : | Institut de Mathématiques de Toulouse (IMT) |
| Université Paul Sabatier - Toulouse III – Université Toulouse le Mirail - Toulouse II – Université des Sciences Sociales - Toulouse I – Institut National des Sciences Appliquées de Toulouse – CNRS : UMR5219 | |
| 2 : | Dipartimento di Matematica [Roma TRE] |
| Università degli Studi Roma TRE | |
| 3 : | Laboratoire d'Analyse et de Mathématiques Appliquées (LAMA) |
| Université Paris Est Marne-la-Vallée – Université Paris XII - Paris Est Créteil Val-de-Marne – CNRS : UMR8050 – Fédération de Recherche Bézout | |
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| Domaine | : | Mathématiques/Probabilités Mathématiques/Théorie spectrale |
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| Spectral theory – Objective method – Operator convergence – Logarithmic potential – Random matrices – Random Graphs – Heavy tailed distributions – alpha-stable laws. |
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| Liste des fichiers attachés à ce document : | ||||||||||
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| hal-00490516, version 5 | |
| http://hal.archives-ouvertes.fr/hal-00490516 | |
| oai:hal.archives-ouvertes.fr:hal-00490516 | |
| Contributeur : Djalil Chafai | |
| Soumis le : Jeudi 13 Octobre 2011, 17:47:27 | |
| Dernière modification le : Mercredi 4 Janvier 2012, 23:40:35 | |