Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Domaines cond-mat.stat-mech
Date Mercredi 15 Décembre 2021
Heure 14:30
Institut LPENS
Salle L367
Nom de l'orateur Giacomin
Prenom de l'orateur Giambattista
Addresse email de l'orateur
Institution de l'orateur DMA ENS & LPSM
Titre The effect of disorder on pinning models: old and new results
Résumé Pinning models are a class of exactly solvable models that display a phase transition from a delocalized to a localized phase. They naturally appears as simplified models for DNA denaturation or for interface wetting in two dimensional systems. Much is known by now also on the disordered versions of these models. The aim of the talk is to give a review of some of the main reults in this field and to discuss generalized pinning models in which, in addition to a localization transition, another type of transition is observed (in absence of disorder). In fact, a partially localized regime may appear. In mathematical temrs the key word to have a glimpse of how the partially localized trajectories look like is « big jump ». The final aim of the talk is to explain that (and hopefully why) partial localization is incompatible with the presence of disorder. In other words, disorder smooths the partial localization transition.
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