43 research outputs found
Pseudo-Random Number Generators for Vector Processors and Multicore Processors
Large scale Monte Carlo applications need a good pseudo-random number generator capable of utilizing both the vector processing capabilities and multiprocessing capabilities of modern computers in order to get the maximum performance. The requirements for such a generator are discussed. New ways of avoiding overlapping subsequences by combining two generators are proposed. Some fundamental philosophical problems in proving independence of random streams are discussed. Remedies for hitherto ignored quantization errors are offered. An open source C++ implementation is provided for a generator that meets these needs
Off-equilibrium relaxational dynamics with improved Ising Hamiltonian
We study the off-equilibrium relaxational dynamics at criticality in the
three-dimensional Blume-Capel model whose static critical behaviour belongs to
the 3d-Ising universality class. Using "improved" Hamiltonian (the leading
corrections to scaling have vanishing amplitude) we perform Monte Carlo
simulations of the relaxational dynamics after a quench from to
. Analysing the off-equilibrium dynamics at we obtain an estimate of
the dynamical critical exponent that is perfectly consistent with
the Field Theory predictions.Comment: 14 pages, 7 figures, references added, to appear in J. Stat. Mec