2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/148699We present an analysis of high precision Monte Carlo data for the two dimensional S=1/2 quantum Heisenberg antiferromagnet up to $ξ= 95.7(3)$ obtained by the continuous time version of the loop algorithm. Our data are in good agreement with a prediction of the recent theory (Phys. Rev. Lett. vol. 77, 3439 (1996)) in very high temperature regime, but they strongly disagree with it in the low temperature regime.Modified with improved data; to appear in Phys. Rev. Lett. as a Comment; latex file and one eps fileStatistical MechanicsSuperconductivityHigh Energy Physics - Latticetext