| HAL : hal-00009063, version 1 |
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| Self-Intersection Times for Random Walk, and Random Walk in Random Scenery |
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| Amine Asselah 1Fabienne Castell 1 |
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| (27/09/2005) |
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| We consider Random Walk in Random Scenery , denoted $X_n$, where the random walk is symmetric on $Z^d$, with $d>4$, and the random field is made up of i.i.d random variables with a stretched exponential tail decay, with exponent $\alpha$ with $1<\alpha$. We present asymptotics for the probability, over both randomness, that $\{X_n>n^{\beta}\}$ for $1/2<\beta<1$. To obtain such asymptotics, we establish large deviations estimates for the the self-intersection local times process. |
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| 1 : | Laboratoire d'Analyse, Topologie, Probabilités (LATP) |
| CNRS : UMR6632 – Université de Provence - Aix-Marseille I – Université Paul Cézanne - Aix-Marseille III | |
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| Domaine | : | Mathématiques/Probabilités |
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| moderate deviations – self-intersection – local times – random walk – random scenery. |
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| hal-00009063, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00009063 | |
| oai:hal.archives-ouvertes.fr:hal-00009063 | |
| Contributeur : Amine Asselah | |
| Soumis le : Mardi 27 Septembre 2005, 07:50:34 | |
| Dernière modification le : Mardi 27 Septembre 2005, 15:52:41 | |