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arXiv 1603.03362math.PRmath-phmath.MP
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关于二维高斯自由场的有界型薄局部集

On bounded-type thin local sets of the two-dimensional Gaussian free field

Juhan Aru, Avelio Sepúlveda, Wendelin Werner

摘要:

本文研究了单连通区域中二维高斯自由场(GFF)的某些局部集,以及它们与共形环系综CLE(4)及其变体的关系。更具体地说,我们考虑有界型薄局部集(BTLS),其中薄意味着局部集的大小很小,有界型意味着描述远离局部集的场的平均值的调和函数由某些确定性常数限定。我们证明了局部集是BTLS当且仅当它包含在CLE(4)地毯的某些嵌套版本中,并证明了所有BTLS必然连接到域的边界。我们还构造了所有可能的BTLS,其相应的调和函数仅取两个规定值,并表明所有这些集合(这包括CLE(4)的情况)实际上是GFF的可测函数。

英文摘要:

We study certain classes of local sets of the two-dimensional Gaussian free field (GFF) in a simply-connected domain, and their relation to the conformal loop ensemble CLE(4) and its variants. More specifically, we consider bounded-type thin local sets (BTLS), where thin means that the local set is small in size, and bounded-type means that the harmonic function describing the mean value of the field away from the local set is bounded by some deterministic constant. We show that a local set is a BTLS if and only if it is contained in some nested version of the CLE(4) carpet, and prove that all BTLS are necessarily connected to the boundary of the domain. We also construct all possible BTLS for which the corresponding harmonic function takes only two prescribed values and show that all these sets (and this includes the case of CLE(4)) are in fact measurable functions of the GFF.

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