GRAMSES: a new route to general relativistic $N$-body simulations in cosmology. Part I. Methodology and code description

@article{BarreraHinojosa2019GRAMSESAN,
  title={GRAMSES: a new route to general relativistic \$N\$-body simulations in cosmology. Part I. Methodology and code description},
  author={C. Barrera-Hinojosa and Baojiu Li},
  journal={arXiv: Cosmology and Nongalactic Astrophysics},
  year={2019}
}
We present GRAMSES, a new pipeline for nonlinear cosmological $N$-body simulations in General Relativity (GR). This code adopts the Arnowitt-Deser-Misner (ADM) formalism of GR, with constant mean curvature and minimum distortion gauge fixings, which provides a fully nonlinear and background independent framework for relativistic cosmology. Employing a fully constrained formulation, the Einstein equations are reduced to a set of ten elliptical equations which are solved using multigrid… Expand

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