Reconciliation of the correlation length for high-spin Heisenberg antiferromagnets

We present numerical results that definitively confirm that chiral perturbation theory, corrected for cutoff effects, describes the low-temperature behavior of the correlation length in the antiferromagnetic Heisenberg model (AFHM) for spins S > 1/2. With two independent quantum Monte Carlo algorithms, coupled with a finite-size scaling technique, we explore correlation lengths ξ ∼ 105 for spins S = 1 and 5/2. We show how the recent prediction of cutoff effects in the AFHM by P. Hasenfratz is approached in the low-temperature limit