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Revising the universality class of the four-dimensional Ising model
Umeå University, Faculty of Science and Technology, Department of Mathematics and Mathematical Statistics.ORCID iD: 0000-0002-6291-5885
Umeå University, Faculty of Science and Technology, Department of Mathematics and Mathematical Statistics.
2023 (English)In: Nuclear Physics B, ISSN 0550-3213, E-ISSN 1873-1562, Vol. 993, article id 116256Article in journal (Refereed) Published
Abstract [en]

The aim of this paper is to determine the behavior of the specific heat of the 4-dimensional Ising model in a region around the critical temperature, and via that determine if the Ising model and the ϕ4-model belong to the same universality class in dimension 4. In order to do this we have carried out what is currently the largest scale simulations of the 4-dimensional Ising model, extending the lattices size up to L=256 and the number of samples per size by several orders of magnitude compared to earlier works, keeping track of data for both the canonical and microcanonical ensembles. Our conclusion is that the Ising model has a bounded specific heat, while the ϕ4-model is known to have a logarithmic divergence at the critical point. Hence the two models belong to distinct universality classes in dimension 4.

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2023. Vol. 993, article id 116256
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URN: urn:nbn:se:umu:diva-212073DOI: 10.1016/j.nuclphysb.2023.116256Scopus ID: 2-s2.0-85163809991OAI: oai:DiVA.org:umu-212073DiVA, id: diva2:1782893
Available from: 2023-07-18 Created: 2023-07-18 Last updated: 2023-07-18Bibliographically approved

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Lundow, Per-HåkanMarkström, Klas

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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