Application of the Ewald method to cosmological N-body simulations

Details Application of the Ewald method to cosmological N-body simulations Application of the Ewald method to cosmological N-body simulations

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990stin...9111637h&link_type=abstract

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Mathematics

Computerized Simulation, Cosmology, Fourier Transformation, Many Body Problem, Mathematical Models, Algorithms, Boundary Conditions, Computer Programs, Trees (Mathematics)

Scientific paper

Fully periodic boundary conditions are incorporated into a gridless cosmological N-body code using the Ewald method. It is shown that the linear evolution of density fluctuations agrees well with analytic calculations, contrary to the case of quasi-periodic boundary conditions where the fundamental mode grows too rapidly. The implementation of fully periodic boundaries is of particular importance to relative comparisons of methods based on hierarchical tree algorithms and more traditional schemes using Fourier techniques such as PM and P3 M codes.

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