Corpus ID: 235421817

Screening vs. gevolution: in chase of a perfect cosmological simulation code

@inproceedings{Eingorn2021ScreeningVG,
  title={Screening vs. gevolution: in chase of a perfect cosmological simulation code},
  author={M. Eingorn and A. Yukselci and A. Zhuk},
  year={2021}
}
We compare two competing relativistic approaches to the N-body simulation of the Universe large-scale structure. To this end, employing the corresponding alternative computer codes (“gevolution” and “screening”), we conduct a series of cosmological simulations in boxes of different sizes and calculate the power spectra of the scalar perturbation Φ, the frame-dragging vector potential B and the difference between scalar modes χ = Φ−Ψ. We demonstrate that the corresponding power spectra are in… Expand

Figures and Tables from this paper

References

SHOWING 1-10 OF 29 REFERENCES
gevolution: a cosmological N-body code based on General Relativity
We present a new N-body code, gevolution, for the evolution of large scale structure in the Universe. Our code is based on a weak field expansion of General Relativity and calculates all six metricExpand
Duel of cosmological screening lengths
Two distinct perturbative approaches have been recently formulated within General Relativity, arguing for the screening of gravity in the $\Lambda$CDM Universe. In this paper we compare them and showExpand
General relativistic N -body simulations in the weak field limit
We develop a formalism for general relativistic $N$-body simulations in the weak field regime, suitable for cosmological applications. The problem is kept tractable by retaining the metricExpand
Cosmic screening of the gravitational interaction
We study a universe filled with cold dark matter in the form of discrete inhomogeneities (e.g., galaxies) and dark energy in the form of a continuous perfect fluid. We develop a first-order scalarExpand
The evolution of large-scale structure in a universe dominated by cold dark matter
The results of numerical simulations of nonlinear gravitational clustering in universes dominated by weakly interacting, 'cold' dark matter are presented. The numerical methods used and the way inExpand
N-body methods for relativistic cosmology
We present a framework for general relativistic N-body simulations in the regime of weak gravitational fields. In this approach, Einstein's equations are expanded in terms of metric perturbationsExpand
Second-order Cosmological Perturbations Engendered by Point-like Masses
In the $\Lambda$CDM framework, presenting nonrelativistic matter inhomogeneities as discrete massive particles, we develop the second-order cosmological perturbation theory. Our approach relies onExpand
Perfect fluids with ω=const as sources of scalar cosmological perturbations
Abstract We make a generalization of a self-consistent first-order perturbation scheme, being suitable for all (sub-horizon and super-horizon) scales, which has been recently constructed for theExpand
Analytic expressions for the second-order scalar perturbations in the ΛCDM Universe within the cosmic screening approach
Abstract We study the second-order scalar perturbations in the conventional Λ CDM Universe within the cosmic screening approach. The analytic expressions for both the velocity-independent andExpand
The Cosmic Linear Anisotropy Solving System (CLASS). Part II: Approximation schemes
Boltzmann codes are used extensively by several groups for constraining cosmo- logical parameters with Cosmic Microwave Background and Large Scale Structure data. This activity is computationallyExpand
...
1
2
3
...