Random Currents and Continuity of Ising Model’s Spontaneous Magnetization

Michael Aizenman, Hugo Duminil-Copin, Vladas Sidoravicius

Research output: Contribution to journalArticlepeer-review

58 Scopus citations


The spontaneous magnetization is proved to vanish continuously at the critical temperature for a class of ferromagnetic Ising spin systems which includes the nearest neighbor ferromagnetic Ising spin model on (Formula presented.) in d = 3 dimensions. The analysis also applies to higher dimensions, for which the result is already known, and to systems with interactions of power law decay. The proof employs in an essential way an extension of the Ising model’s random current representation to the model’s infinite volume limit. Using it, we relate the continuity of the magnetization to the vanishing of the free boundary condition Gibbs state’s long range order parameter. For reflection positive models the resulting criterion for continuity may be established through the infrared bound for all but the borderline lower dimensional cases. The exclusion applies to the one dimensional model with 1/r2 interaction for which the spontaneous magnetization is known to be discontinuous at Tc.

Original languageEnglish (US)
Pages (from-to)719-742
Number of pages24
JournalCommunications In Mathematical Physics
Issue number2
StatePublished - Mar 2015

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Mathematical Physics


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