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Universal Non-Gaussian Initial Conditions for N-body Simulations by Regan, D. M.; Schmittfull, M. M.; Shellard, E. P. S.; Fergusson, J. R. is a scholarly article available to read on EtoBox.

What is Universal Non-Gaussian Initial Conditions for N-body Simulations about?

In this paper we present the implementation of an efficient formalism for the generation of arbitrary non-Gaussian initial conditions for use in N-body simulations. The methodology involves the use of a separable modal approach for decomposing a primordial bispectrum or trispectrum. This approach allows for the far more efficient generation of the non-Gaussian initial conditions already described in the literature, as well as the generation for the first time of non-separable bispectra and the special class of diagonal-free trispectra. The modal approach also allows for the reconstruction of the spectra from given realisations, a fact which is exploited to provide an accurate consistency check of the simulations.

Author

Regan, D. M.; Schmittfull, M. M.; Shellard, E. P. S.; Fergusson, J. R.

Published

2011

Language

EN