Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
1992-11-19
Nucl.Phys.Proc.Suppl. 30 (1993) 846-850
Physics
High Energy Physics
High Energy Physics - Lattice
4 pages, (contribution to the Lattice92 proceedings) 1 postscript file as uufile included. Preprints FUB-HEP 21/92 and HLRZ 89
Scientific paper
10.1016/0920-5632(93)90340-C
We report measurements of the critical exponents of the classical three-dimensional Heisenberg model on simple cubic lattices of size $L^3$ with $L$ = 12, 16, 20, 24, 32, 40, and 48. The data was obtained from a few long single-cluster Monte Carlo simulations near the phase transition. We compute high precision estimates of the critical coupling $K_c$, Binder's parameter $U^* and the critical exponents $\nu,\beta / \nu, \eta$, and $\alpha / \nu$, using extensively histogram reweighting and optimization techniques that allow us to keep control over the statistical errors. Measurements of the autocorrelation time show the expected reduction of critical slowing down at the phase transition as compared to local update algorithms. This allows simulations on significantly larger lattices than in previous studies and consequently a better control over systematic errors in finite-size scaling analyses.
Holm Ch.
Janke Wolfhard
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