Two-Dimensional $O(3)$ $σ$-Model up to Correlation Length $10^5$

Details Two-Dimensional $O(3)$ $σ$-Model up to Correlation Length $10^5$ Two-Dimensional $O(3)$ $σ$-Model up to Correlation Length $10^5$

1994-11-28

arxiv.org/abs/hep-lat/9411064v1

Nucl.Phys.Proc.Suppl. 42 (1995) 752-754

Physics

High Energy Physics

High Energy Physics - Lattice

3 pages including 3 figures, 170894 bytes Postscript, contribution to Lattice '94; see also hep-lat/9409004 and hep-lat/941100

Scientific paper

10.1016/0920-5632(95)00371-F

We carry out a high-precision Monte Carlo simulation of the two-dimensional $O(3)$-invariant $\sigma$-model at correlation lengths $\xi$ up to $\sim 10^5$. Our work employs a new and powerful method for extrapolating finite-volume Monte Carlo data to infinite volume, based on finite-size-scaling theory. We compare the extrapolated data to the renormalization-group predictions. The deviation from asymptotic scaling, which is $\approx 25\%$ at $\xi \sim 10^2$, decreases to $\approx 4\%$ at $\xi \sim 10^5$.

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