One-dimensional impenetrable anyons in thermal equilibrium: III. Large distance asymptotics of the space correlations

Abstract

Using the determinant representation for the field–field correlation functions of impenetrable anyons at finite temperature obtained in [1], we derive a system of nonlinear partial differential equations completely characterizing the correlators. The system is the same as the one for impenetrable bosons but with different initial conditions. The large-distance asymptotic behavior of the correlation functions is obtained from the analysis of the Riemann–Hilbert problem associated with the system of differential equations. We calculate both the exponential and pre-exponential factors in the asymptotics of the field–field correlators. The asymptotics derived in this way agree with those of the free fermions and impenetrable bosons in the appropriate limits, κ → 1 and κ → 0, of the statistics parameter κ, and coincide with the predictions of the conformal field theory at low temperatures.