$(\nabla+Δ)$模型的尺度极限
The scaling limit of the $(\nabla+Δ)$-model
摘要:
本文研究了$\mathbb{Z}^d$上界面模型的标度极限,其中哈密顿量由梯度和Laplacian相互作用给出。我们表明,在任何维度的标度极限是由高斯自由场。我们讨论了适当的空间中的收敛发生。而在无限体积的证明是基于傅立叶分析方法,在有限体积中,我们依赖于一些离散PDE技术,涉及有限差分近似的椭圆边值问题。
英文摘要:
In this article we study the scaling limit of the interface model on $\mathbb{Z}^d$ where the Hamiltonian is given by a mixed gradient and Laplacian interaction. We show that in any dimension the scaling limit is given by the Gaussian free field. We discuss the appropriate spaces in which the convergence takes place. While in infinite volume the proof is based on Fourier analytic methods, in finite volume we rely on some discrete PDE techniques involving finite-difference approximation of elliptic boundary value problems.
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