Correlation Functions in the Two-dimensional Ising Model in a Magnetic Field at T=Tc
G. Delfino, P. Simonetti
Abstract
The one and two-particle form factors of the energy operator in the two-dimensional Ising model in a magnetic field at T=Tc are exactly computed within the form factor bootstrap approach. Together with the matrix elements of the magnetisation operator already computed in ref.\,immf, they are used to write down the large distance expansion for the correlators of the two relevant fields of the model.
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