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Название: Sine-Gordon/Coulomb Gas Soliton Correlation Functions and an Exact Evaluation of the Kosterlitz–Thouless Critical Exponent
Авторы: Leonardo Mondaini, E. C. Marino
We present an exact derivation for the asymptotic large distance behavior of
the spin two-point correlation function in the XY-model. This allows for the
exact obtainment of the critical exponent η = 1/4 at the Kosterlitz–Thouless
transition that occurs in this model and in the 2D neutral Coulomb gas and
which has been previously obtained by scaling arguments.