| HAL : hal-00578465, version 2 |
| arXiv : 1103.3925 |
| Fiche détaillée | Récupérer au format |
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| Versions disponibles : | v1 (21-03-2011) | v2 (04-04-2011) |
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| Poisson approximations on the free Wigner chaos |
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| Ivan Nourdin 1Giovanni Peccati 2 |
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| (2011) |
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| We prove that an adequately rescaled sequence {F_n} of self-adjoint operators, living inside a fixed free Wigner chaos of even order, converges in distribution to a free Poisson random variable with rate lambda>0 if and only if varphi(F_n^4)- 2 varphi(F_n^3)--> 2 lambda^2-lambda (where varphi is the relevant tracial operator). This extends to a free setting some recent limit theorems by Nourdin and Peccati (2009), and provides a non-central counterpart to a result by Kemp et al. (2011). As a by-product of our findings, we show that Wigner chaoses of order strictly greater than 2 do not contain non-zero free Poisson random variables. Our techniques involve the so-called 'Riordan numbers', counting non-crossing partitions without singletons. |
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| 1 : | Institut Elie Cartan Nancy (IECN) |
| CNRS : UMR7502 – INRIA – Université Henri Poincaré - Nancy I – Université Nancy II – Institut National Polytechnique de Lorraine (INPL) | |
| 2 : | Unité de Recherche en Mathématiques |
| Université du Luxembourg | |
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| Probabilités et statistiques |
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| Domaine | : | Mathématiques/Probabilités |
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| Catalan numbers – Contractions – Free Brownian motion – Free cumulants – Free Poisson distribution – Free probability – Non-central limit theorems – Non-crossing partitions – Riordan numbers – Semicircular distribution – Wigner chaos. |
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| Liste des fichiers attachés à ce document : | ||||||||||
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| hal-00578465, version 2 | |
| http://hal.archives-ouvertes.fr/hal-00578465 | |
| oai:hal.archives-ouvertes.fr:hal-00578465 | |
| Contributeur : Ivan Nourdin | |
| Soumis le : Lundi 4 Avril 2011, 08:14:17 | |
| Dernière modification le : Mercredi 13 Avril 2011, 16:28:05 | |