2019
DOI: 10.1007/s00220-019-03541-1
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Circle Patterns and Critical Ising Models

Abstract: A circle pattern is an embedding of a planar graph in which each face is inscribed in a circle. We define and prove magnetic criticality of a large family of Ising models on planar graphs whose dual is a circle pattern. Our construction includes as a special case the critical isoradial Ising models of Baxter.

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Cited by 13 publications
(11 citation statements)
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“…Remark 6.4. Though this is not fully clear at the moment, we hope that, at least in some situations of interest (e.g., see Section 6.4 or[38]), s-subharmonic functions H F obtained via (2.14) are a priori close to s-harmonic ones; recall that this is exactly the viewpoint developed in[18, Section 3] for the critical Z-invariant model. Also, note that extending the domain of definition of H F to ♦(G) similarly to (6.1), one can easily see that thus obtained functions satisfy the maximum principle.…”
mentioning
confidence: 84%
See 1 more Smart Citation
“…Remark 6.4. Though this is not fully clear at the moment, we hope that, at least in some situations of interest (e.g., see Section 6.4 or[38]), s-subharmonic functions H F obtained via (2.14) are a priori close to s-harmonic ones; recall that this is exactly the viewpoint developed in[18, Section 3] for the critical Z-invariant model. Also, note that extending the domain of definition of H F to ♦(G) similarly to (6.1), one can easily see that thus obtained functions satisfy the maximum principle.…”
mentioning
confidence: 84%
“…Below we only sketch some important features of the construction, details will appear elsewhere. Independently of our paper, a special class of s-embeddings -circle patterns -was studied by Lis in [38] and the criticality was proven in the case of uniformly bounded faces.…”
Section: Towards Universality Beyond Isoradial Graphsmentioning
confidence: 99%
“…We refer the interested reader to [43,Section 4] for more references on 'the relationship between the Ising model and discrete holomorphy' and for a discussion of special solutions (Dirac spinors) of the propagation equation (1.5) on discrete Riemann surfaces, and to [6] for more information on the non-critical model. • Critical Ising model on circle patterns introduced by Lis in [41] as a generalization of the isoradial context. In this setup the quads S (z) are kites, which allow to view S as a circle pattern.…”
Section: Definitions and Preliminariesmentioning
confidence: 99%
“…As mentioned in the introduction, there are two notable classes of examples of α-embeddings. The class of 1-embeddings of a planar graph correspond to s-embeddings defined by Chelkak in [5] (see also [19]), while the class of 2embeddings correspond to harmonic embeddings [22,13].…”
Section: Embeddings and Realizationsmentioning
confidence: 99%