Exact asymptotics of the freezing transition of a logarithmically correlated random energy model

Details Exact asymptotics of the freezing transition of a logarithmically correlated random energy model Exact asymptotics of the freezing transition of a logarithmically correlated random energy model

2011-05-12

arxiv.org/abs/1105.2444v2

Physics

Mathematical Physics

Scientific paper

We consider a logarithmically correlated random energy model, namely a model for directed polymers on a Cayley tree, which was introduced by Derrida and Spohn. We prove asymptotic properties of a generating function of the partition function of the model by studying a discrete time analogy of the KPP-equation - thus translating Bramson's work on the KPP-equation into a discrete time case. We also discuss connections to extreme value statistics of a branching random walk and a rescaled multiplicative cascade measure beyond the critical point.

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