title: Critical structure factor in using systems.
abstract: We perform a large-scale Monte Carlo simulation of the three-dimensional Ising model on simple cubic lattices of size L(3) with L=128 and 256. We determine the corresponding structure factor (Fourier transform of the two-point function) and compare it with several approximations and with experimental results. We also compute the turbidity as a function of the momentum of the incoming radiation, focusing in particular on the deviations from the Ornstein-Zernike expression of Puglielli and Ford.
authors.affiliation: Dipartimento di Fisica dell'Università di Roma La Sapienza and INFN, I-00185 Roma, Italy. Victor.Martin@roma1.infn.it
authors.forename: Victor
authors.initials: V
authors.lastname: Martín-Mayor
authors.forename: Andrea
authors.initials: A
authors.lastname: Pelissetto
authors.forename: Ettore
authors.initials: E
authors.lastname: Vicari