numerical-relativity

An early-stage HPC tensor and grid-kernel library for numerical relativity, focused on a SIMD-optimized (SSE/AVX/AVX2/AVX-512/Arm NEON), parallel implementation with OpenMP of the Z4c formulation of Einstein’s equations.

A performance portable numerical relativity code built on AMReX (successor to GRChombo)

NRPyPN: Validated Post-Newtonian Expressions for Numerical Relativity

Package for data-driven and phenomenological gravitational waveform models

A translation of crucial parts of GRTL in torch for accelerated learning

An AMR-based open source code to evolve generalized Proca fields on arbitrary fixed backgrounds

Simple codes to run 3+1 ADM and BSSN evolutions of Kasner initial data

Python Wrapper for GRChombo. Maintainers: @Masquerade0097 @spino17

Python port of WarpFactory - a numerical toolkit for analyzing warp drive spacetimes with general relativity: metrics, Einstein solver, energy conditions

CompactStar is a modular C++ framework for modeling neutron stars, hybrid stars, and exotic compact objects. It includes GR stellar-structure solvers (TOV + Hartle), thermal–chemical–spin evolution, baryon-number–violating (BNV) microphysics, and a full EOS engine for dense matter.

Heron is a surrogate modelling toolkit for python, using Gaussian process regression.

DIfferential Geometry with Python — see the package at the link below

Numerical relativity through automatic differentiation

Binary neutron star simulation with Einstein Toolkit and Lorene, including Psi4 waveform extraction, visualization, and result organization.

Complete singularity-free black hole solution using φ-based geometric structure. SSZ only.

Numerical Relativity Simulation with modified BSSN formulation. (Deprecated)

A fast, accurate neural surrogate for gravitational waveforms from quasi-circular, aligned-spin binary black hole mergers, including higher-order spherical harmonic modes. Results published in: arXiv:2609.03025

Computational proof of the Schwarzschild metric in Python — GR time dilation derivation, orbital trajectory simulation, gravitational redshift calculation, and numerical relativity visualisation.

GRANITE (General-Relativistic Adaptive N-body Integrated Tool for Extreme Astrophysics) is an Open-source C++17 numerical relativity engine implementing CCZ4 spacetime evolution, Valencia GRMHD, and Berger-Oliger AMR. Self-directed learning project — currently under active development (v0.6.8). Open convergence issues documented.

Charged wormhole analysis with rotation, plasma, and shadows. Valid traversable wormhole with observable EHT signatures. Python/NumPy/SciPy.