Abstract
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 [1]. 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.
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Talk presented by G. Mussardo
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Delfino, G., Mussardo, G. (1997). Ising Model in a Magnetic Field. In: Baulieu, L., Kazakov, V., Picco, M., Windey, P. (eds) Low-Dimensional Applications of Quantum Field Theory. NATO ASI Series, vol 361. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-1919-9_12
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