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<p>In the present paper we establish a clear correspondence between probabilities of certain edges belonging to a realization of the <i>uniform spanning tree</i> (UST), and the states of a <i>fermionic Gaussian free field</i>. Namely, we express the probabilities of given edges belonging or not to the UST in terms of fermionic Gaussian expectations. This allows us to explicitly calculate joint probability mass functions of the degree of the UST on a general finite graph, as well as obtain their scaling limits for certain regular lattices.</p>

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Correlations in Uniform Spanning Trees: a Fermionic Approach

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  • 发表日期：

    2025年10月18日

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  • Alan Rapoport

摘要

In the present paper we establish a clear correspondence between probabilities of certain edges belonging to a realization of the uniform spanning tree (UST), and the states of a fermionic Gaussian free field. Namely, we express the probabilities of given edges belonging or not to the UST in terms of fermionic Gaussian expectations. This allows us to explicitly calculate joint probability mass functions of the degree of the UST on a general finite graph, as well as obtain their scaling limits for certain regular lattices.