Localization in log-gamma polymers with boundaries

Abstract : Consider the directed polymer in one space dimension in log-gamma environment with boundary conditions, introduced by Seppäläinen. In the equilibrium case, we prove that the end point of the polymer converges in law as the length increases, to a density proportional to the exponent of a zero-mean random walk. This holds without space normalization, and the mass concentrates in a neighborhood of the minimum of this random walk. We have analogous results out of equilibrium as well as for the middle point of the polymer with both ends fixed. The existence and the identification of the limit relies on the analysis of a random walk seen from its infimum.
Type de document :
Pré-publication, Document de travail
33 pages, 3 figures. 2014
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https://hal.archives-ouvertes.fr/hal-01066230
Contributeur : Vu Lan Nguyen <>
Soumis le : lundi 31 août 2015 - 10:00:13
Dernière modification le : mardi 11 octobre 2016 - 14:10:40
Document(s) archivé(s) le : mardi 1 décembre 2015 - 10:16:10

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Gamma-final.pdf
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  • HAL Id : hal-01066230, version 2
  • ARXIV : 1409.5754

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Francis Comets, Vu Lan Nguyen. Localization in log-gamma polymers with boundaries. 33 pages, 3 figures. 2014. <hal-01066230v2>

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