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arXiv 0906.0992math.PR
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无序等级格点上的定向聚合物

Directed Polymers on Hierarchical Lattices with site disorder

Hubert Lacoin, Gregorio Moreno Flores

摘要:

我们研究的聚合物模型非常接近的介绍和研究\cite{DGr, CD}的层次晶格。对于这个模型,我们证明了自由能的存在性,得到了所有$\gb$都存在很强无序的充要条件,并对自由能在高温下的行为给出了一些精确的结果.我们利用分数阶矩方法和环境测度变换的组合得到了一个上界,并利用二阶矩方法得到了一个下界。我们还得到了$\log Z_n$涨落指数的下界,并研究了弱无序相的无限聚合物测度。

英文摘要:

We study a polymer model on hierarchical lattices very close to the one introduced and studied in \cite{DGr, CD}. For this model, we prove the existence of free energy and derive the necessary and sufficient condition for which very strong disorder holds for all $\gb$, and give some accurate results on the behavior of the free energy at high-temperature. We obtain these results by using a combination of fractional moment method and change of measure over the environment to obtain an upper bound, and second moment method to get a lower bound. We also get lower bounds on the fluctuation exponent of $\log Z_n$, and study the infinite polymer measure in the weak disorder phase.

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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