18 citations · 18 across the 2 of their papers we have counts for
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Towards quantitative control on discreteness error in the non-linear regime of cosmological N body simulations
Michael Joyce, Bruno Marcos, Thierry Baertschiger
The effects of discreteness arising from the use of the N-body method on the accuracy of simulations of cosmological structure formation are not currently well understood. After a…
Linear perturbative theory of the discrete cosmological N-body problem
B. Marcos, T. Baertschiger, M. Joyce +2
We present a perturbative treatment of the evolution under their mutual self-gravity of particles displaced off an infinite perfect lattice, both for a static space and for a homog…
Gravitational Structure Formation
Francesco Sylos Labini, Thierry Baertschiger
We discuss the formation of the first structures in gravitational N-body simulations. The role of two-body interaction is found to be a crucial element and an analogy with the dyna…
Gravitational evolution of a perturbed lattice and its fluid limit
M. Joyce, B. Marcos, A. Gabrielli +2
We apply a simple linearization, well known in solid state physics, to approximate the evolution at early times of cosmological N-body simulations of gravity. In the limit that the…
Growth of correlations in gravitational N-body simulations
Thierry Baertschiger, Francesco Sylos Labini
In the gravitational evolution of a cold infinite particle distribution, two-body interactions can be predominant at early times: we show that, by treating the simple case of a Poi…
Initial conditions, Discreteness and non-linear structure formation in cosmology
Francesco Sylos Labini, Thierry Baertschiger, Andrea Gabrielli +1
In this lecture we address three different but related aspects of the initial continuous fluctuation field in standard cosmological models. Firstly we discuss the properties of the…