Ising Model in a Magnetic Field
The calculation of the spin-spin correlation function G(x) =< σ(x)σ(0) > of the two-dimensional Ising Model in a magnetic field has been a long-standing problem of statistical mechanics. Solution of this problem has been recently obtained by using a quantum field theory approach based on the spectral representation method for correlation functions . The aim of this talk is to illustrate in a plain language the main features of the solution and to comment on some interesting aspects of the method we used.
KeywordsCorrelation Function Form Factor ISING Model Spectral Series Spectral Representation Method
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- P.G. Lauwers and V. Rittenberg, Numerical Estimates of the Spin-Spin Correlation Function for the Critical 2-D Ising Model in a Magnetic Field, Bonn-HE-89–11.Google Scholar