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arXiv 1503.01054math.PR
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具有重尾无序的$(1+1)$ -维定向聚合物的高温极限

High temperature limits for $(1+1)$-dimensional directed polymer with heavy-tailed disorder

Partha S. Dey, Nikos Zygouras

摘要:

Alberts-Khanin-Quastel~ \cite{AKQ12}提出了中间无序区的定向聚合物模型。证明了在温度$βn^{-γ}$与$γ=1/4$成反比时,适当中心化的分拆函数按分布收敛,并给出了其极限.这一结果是在无序变量服从指数矩的假设下得到的,但在六阶矩的假设下也证明了它的普适性。我们证明了这一猜想是有效的,我们进一步扩展了它的展示类不同的普遍限制行为的情况下,小于六个时刻。我们还解释了在不同矩假设和$γ$值下对数分拆函数标度指数的行为。

英文摘要:

The directed polymer model at intermediate disorder regime was introduced by Alberts-Khanin-Quastel~\cite{AKQ12}. It was proved that at inverse temperature $βn^{-γ}$ with $γ=1/4$ the partition function, centered appropriately, converges in distribution and the limit is given in terms of the solution of the stochastic heat equation. This result was obtained under the assumption that the disorder variables posses exponential moments, but its universality was also conjectured under the assumption of six moments. We show that this conjecture is valid and we further extend it by exhibiting classes of different universal limiting behaviors in the case of less than six moments. We also explain the behavior of the scaling exponent for the log-partition function under different moment assumptions and values of $γ$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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