Automatically generated code for relativistic inhomogeneous cosmologies

The applications of numerical relativity to cosmology are on the rise, contributing insight into such cosmological problems as structure formation, primordial phase transitions, gravitational-wave generation, and inflation. In this paper, I present the infrastructure for the computation of inhomogen...

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Bibliographic Details
Published in:Physical review. D 2017-02, Vol.95 (4), Article 044046
Main Author: Bentivegna, Eloisa
Format: Article
Language:English
Subjects:
Cosmology
Gravitational waves
Infrastructure
Inhomogeneity
Numerical relativity
Phase transitions
Relativity
Wave generation
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Summary:The applications of numerical relativity to cosmology are on the rise, contributing insight into such cosmological problems as structure formation, primordial phase transitions, gravitational-wave generation, and inflation. In this paper, I present the infrastructure for the computation of inhomogeneous dust cosmologies which was used recently to measure the effect of nonlinear inhomogeneity on the cosmic expansion rate. I illustrate the code’s architecture, provide evidence for its correctness in a number of familiar cosmological settings, and evaluate its parallel performance for grids of up to several billion points. The code, which is available as free software, is based on the Einstein Toolkit infrastructure, and in particular leverages the automated code generation capabilities provided by its component Kranc.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.95.044046