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arXiv · 2212.06029

Positive and negative moments for directed polymers in random environment in weak disorder

Rodrigo Bazaes·Chiranjib Mukherjee
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Abstract

Very recently, Junk [11] showed that for directed polymers in bounded random environments, the weak disorder (uniform integrable) phase implies that the polymer martingale is bounded in $L^p$ for some $p>1$ and also in $L^q$ for some $q<0$. Here, we establish this characterization of the weak disorder phase without requiring the boundedness assumption on the environments.

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Rodrigo Bazaes, Chiranjib Mukherjee. 2022-12-12. Positive and negative moments for directed polymers in random environment in weak disorder. https://arxiv.org/abs/2212.06029

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