Correlation Function in Ising Models

Details Correlation Function in Ising Models Correlation Function in Ising Models

1994-03-09

arxiv.org/abs/hep-lat/9403009v1

Physics

High Energy Physics

High Energy Physics - Lattice

16 pages Latex, uuencoded compressed tar file with 6 figures included

Scientific paper

10.1016/0378-4371(94)90195-3

We simulated the fourier transform of the correlation function of the Ising model in two and three dimensions using a single cluster algorithm with improved estimators. The simulations are in agreement with series expansion and the available exact results in $d=2$, which shows, that the cluster algorithm can succesfully be applied for correlations. We show as a further result that our data do not support a hypothesis of Fisher that in any $d=2$ lattice the fourier transform of the correlation function depends on the lattice generating function only. In $d=3$ our simulation are again in agreement with the results from the series expansion, except for the amplitudes $f_{\pm}$, where we find $f_+/f_-=2.06(1)$.

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