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arXiv 1206.4573math.PRmath-phmath.MP
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用弗雷德霍姆行列式恒等式研究对数-γ聚合物自由能涨落

Log-Gamma polymer free energy fluctuations via a Fredholm determinant identity

Alexei Borodin, Ivan Corwin, Daniel Remenik

摘要:

我们证明了在n^{1/3}标度下,Seppalainen的log-Gamma离散定向聚合物的自由能在n趋于无穷大时的极限分布是GUE Tracy-Widom.本文的主要技术创新是给出了一类n重围道积分与一类弗雷德霍姆行列式之间的一般恒等式。应用这一身份的积分公式证明在[科温-奥康纳-Seppalainen-Zyeras]的拉普拉斯变换的对数-伽马聚合物分拆函数,我们到达一个弗雷德霍姆行列式,这有助于渐近分析(从而产生自由能极限定理)。该弗雷德霍姆行列式预计在[鲍罗丁,科温]通过形式主义的麦克唐纳进程,但其严格的证明是迄今缺乏,因为非平凡的某些衰变估计所需的做法。

英文摘要:

We prove that under n^{1/3} scaling, the limiting distribution as n goes to infinity of the free energy of Seppalainen's log-Gamma discrete directed polymer is GUE Tracy-Widom. The main technical innovation we provide is a general identity between a class of n-fold contour integrals and a class of Fredholm determinants. Applying this identity to the integral formula proved in [Corwin-O'Connell-Seppalainen-Zygouras] for the Laplace transform of the log-Gamma polymer partition function, we arrive at a Fredholm determinant which lends itself to asymptotic analysis (and thus yields the free energy limit theorem). The Fredholm determinant was anticipated in [Borodin-Corwin] via the formalism of Macdonald processes yet its rigorous proof was so far lacking because of the nontriviality of certain decay estimates required by that approach.

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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