Two-Dimensional Ising Model as an Exactly Solvable Relativistic Quantum Field Theory: Explicit Formulas for <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>n</mi></math></span>-Point Functions

Barry M. McCoy; Craig A. Tracy; Tai Tsun Wu

doi:10.1103/PhysRevLett.38.793

Two-Dimensional Ising Model as an Exactly Solvable Relativistic Quantum Field Theory: Explicit Formulas for $n$ -Point Functions

Barry M. McCoy, Craig A. Tracy, and Tai Tsun Wu

Phys. Rev. Lett. 38, 793 – Published 11 April 1977

Abstract

For both $T > T_{c}$ and $T < T_{c}$ , we report exact expressions for the $n$ -spin correlation function of the two-dimensional Ising model suitable for studying large separations between spins. In particular, the scaling limit of these correlation functions can be shown to exist and yields $n$ -point Schwinger functions of some relativistic quantum field theories.