Perturbative computation of 2D NLSM energy-density to fourth order agrees with TBA large-h asymptotics.
Space-like asymptotics of the thermal two-point functions of the XXZ spin-1/2 chain
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A note on the 2D NLSM free energy
Perturbative computation of 2D NLSM energy-density to fourth order agrees with TBA large-h asymptotics.