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We consider directed polymers in random environment on the lattice Z d at small inverse temperature and dimension d ≥ 3. Then, the normalized partition function W n is a regular martingale with limit W. We prove that n (d−2)/4 (W n − W)/W n converges in distribution to a Gaussian law. Both the polynomial rate of convergence and the scaling with the martingale W n are different from those for polymers on trees

Topics:
regular martingale, rate of convergence, Directed polymers, random environment, weak disorder, central limit theorem for martingales, stable and mixing convergence, [MATH.MATH-PR] Mathematics [math]/Probability [math.PR]

Publisher: HAL CCSD

Year: 2016

OAI identifier:
oai:HAL:hal-01316122v2

Provided by:
Hal-Diderot

Downloaded from
https://hal.archives-ouvertes.fr/hal-01316122v2/document

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