Alternative phenomenological coupling parameter for finite-size analysis of numerical data at criticality

作者：Lundow P H^*; Campbell I A

来源：Physical Review B, 2010, 82(2): 024414.

DOI：10.1103/PhysRevB.82.024414

We introduce a parameter W(beta,L) =(pi <vertical bar m vertical bar > (2)/< m(2)>- 2/(pi-2) which like the kurtosis (Binder cumulant) is a phenomenological coupling characteristic of the shape of the distribution p(m) of the order parameter m. To demonstrate the use of the parameter we analyze extensive numerical data obtained from density-of-states measurements on the canonical simple-cubic spin-1/2 Ising ferromagnet, for sizes L=4 to L=256. Using the W parameter accurate estimates are obtained for the critical inverse temperature

• 出版日期2010-7-14