Journal
PHYSICAL REVIEW LETTERS
Volume 118, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.118.241601
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Funding
- National Centre of Competence in Research SwissMAP - Swiss National Science Foundation
- Simons Foundation [397411, 488655]
- Natural Sciences and Engineering Research Council of Canada
- Direct For Mathematical & Physical Scien
- Division Of Physics [1620628] Funding Source: National Science Foundation
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The d-dimensional long-range Ising model, defined by spin-spin interactions decaying with the distance as the power 1/r(d+s), admits a second-order phase transition with continuously varying critical exponents. At s = s(*), the phase transition crosses over to the usual short-range universality class. The standard field-theoretic description of this family of models is strongly coupled at the crossover. We find a new description, which is instead weakly coupled near the crossover, and use it to compute critical exponents. The existence of two complementary UV descriptions of the same long-range fixed point provides a novel example of infrared duality.
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