CLUSTEREASY: A program for lattice simulations of scalar fields in an expanding universe on parallel computing clusters

Published: 15 October 2008| Version 1 | DOI: 10.17632/p5j5vzbs9v.1
Gary Felder


Abstract We describe an MPI C++ program that we have written and made available for calculating the evolution of interacting scalar fields in an expanding universe on parallel clusters. The program is a parallel programming extension of the simulation program LATTICEEASY. The ability to run these simulations on parallel clusters, however, greatly extends the range of scales and times that can be simulated. The program is particularly useful for the study of reheating and thermalization after inflation... Title of program: CLUSTEREASY Catalogue Id: AEBJ_v1_0 Nature of problem After inflation the universe consisted of interacting fields in a high energy, nonthermal state. [1] The evolution of these fields can not be described with standard approximation techniques such as linearization, kinetic theory, or Hartree expansion, and must thus be simulated numerically. Fortunately, the fields rapidly acquire large occupation numbers over a range of frequencies, so their evolution can be accurately modeled with classical field theory. [2] The specific fields and interactions ... Versions of this program held in the CPC repository in Mendeley Data AEBJ_v1_0; CLUSTEREASY; 10.1016/j.cpc.2008.06.002 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)



Astronomy, Astrophysics, Computational Physics