Instantons and the Ising model below Tc
- 1 October 1980
- journal article
- Published by IOP Publishing in Journal of Physics A: General Physics
- Vol. 13 (10) , L381-L385
- https://doi.org/10.1088/0305-4470/13/10/008
Abstract
Recent series expansion estimates of the lattice Ising model suggest strongly that at fixed temperature below Tc the perturbation expansion of the magnetisation as a power series in the external field is asymptotic. The published results are in excellent agreement with the universal features of the essential singularity predicted by field theory calculations using instantons. Further tests of the latter are discussed.Keywords
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