Heavily modified version of GABE C++ code for paper https://arxiv.org/abs/2007.10978. Solves coupled differential equations for early universe reheating on finite spatial lattice. Plus helpful mathematica noteboks (made by me).

Simulating the nonlinear dynamics between a scalar and a massive vector field in an expanding universe.

Steinmetz, A., Yang, C. T. & Rafelski, J. Matter-antimatter origin of cosmic magnetism. Phys. Rev. D 108 (2023).

This repository includes mathematica codes for reproducing and cross-checking the results from sterile neutrino dark matter pioneered papers. Also it includes codes for freeze out and freeze in processes using toy models.Along with this, there are codes for leptogenesis process using neutrinos in early universe.

Exploring 3D space expansion using OpenGL based on the least resistance principle.

Simplified Models and subHalos distributions

Cosmological applications of the SymC framework. Applies χ ≈ 1 stability principles to universe-scale phenomena including cosmic acceleration onset, black hole thermodynamics, and cyclical cosmology. Demonstrates framework consistency from quantum boundaries to cosmic structure.Retry

Rafelski, J., Birrell, J., Grayson, C. et al. Quarks to Cosmos:. Eur. Phys. J. Spec. Top. 234, 1125–1329 (2025).

Rafelski, J., Birrell, J., Steinmetz, A. and Yang, C.T. A short survey of matter-antimatter evolution in the primordial universe. Universe 9.7 (2023): 309.

Steinmetz, A. Modern topics in relativistic spin dynamics and magnetism. PhD dissertation. University of Arizona, 2023.

Colab code making sure GRTT doesn't break the early universe and ends up with essentially what we currently have

This essay presents a clear and intuitive overview of the full Siamese Universe framework. It explains how a shared quantum vacuum, a minimal phase desynchronization, and CPT symmetry together generate matter, structure, and cosmic complexity. A causal narrative linking physical principles and observable signatures.