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arXiv 1004.4408math.PRmath-phmath.FAmath.MP
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连续自旋系统的谱隙和对数Sobolev常数

Spectral gap and logarithmic Sobolev constant for continuous spin systems

Mu-Fa Chen

摘要:

本文研究连续自旋系统的谱隙和对数Sobolev常数。定理1.1给出了有限维系统谱间隙的一个简单而一般的估计结果,即一维边值的谱间隙。对这一主题的研究为我们提供了一个机会,这确实是本文的另一个目的,证明以前获得的结果的力量。给出了两个典型的无穷维模型在一维上的精确阶(命题1.4),以及谱隙和对数Sobolev常数的精确首阶和显式正值区域(定理6.2和6.3).由于我们对显式估计感兴趣,计算变得相当复杂。一个很长的部分(第4节)致力于研究的频谱差距在一个维度。

英文摘要:

The aim of this paper is to study the spectral gap and the logarithmic Sobolev constant for continuous spin systems. A simple but general result for estimating the spectral gap of finite dimensional systems is given by Theorem 1.1, in terms of the spectral gap for one-dimensional marginals. The study of the topic provides us a chance, and it is indeed another aim of the paper, to justify the power of the results obtained previously. The exact order in dimension one (Proposition 1.4), and then the precise leading order and the explicit positive regions of the spectral gap and the logarithmic Sobolev constant for two typical infinite-dimensional models are presented (Theorems 6.2 and 6.3). Since we are interested in explicit estimates, the computations become quite involved. A long section (Section 4) is devoted to the study of the spectral gap in dimension one.

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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