CLASS_IDE: Cosmic Linear Anisotropy Solving System for Interacting Dark Energy

This repository contains a modified version of the publicly available Einstein-Boltzmann code CLASS for the Interacting Dark Energy (IDE) model used in:

• Interacting Dark Energy after DESI Baryon Acoustic Oscillation measurements.
• Quantifying the S8 tension and evidence for interacting dark energy from redshift-space distortion measurements.
• New constraints on interacting dark energy from DESI DR2 BAO observations.
• Cosmological anatomy of interacting dark energy.

References

If you use this code in your research, please cite the following papers:

Bibtex entry

@article{Sabogal:2026bsw,
    author = "Sabogal, Miguel A. and Vagnozzi, Sunny and Di Valentino, Eleonora",
    title = "{Cosmological anatomy of interacting dark energy}",
    eprint = "2609.18288",
    archivePrefix = "arXiv",
    primaryClass = "astro-ph.CO",
    month = "9",
    year = "2026"
}

@article{Giare:2024smz,
author = "Giar{\`e}, William and Sabogal, Miguel A. and Nunes, Rafael C. and Di Valentino, Eleonora",
title = "{Interacting Dark Energy after DESI Baryon Acoustic Oscillation Measurements}",
eprint = "2404.15232",
archivePrefix = "arXiv",
primaryClass = "astro-ph.CO",
doi = "10.1103/PhysRevLett.133.251003",
journal = "Phys. Rev. Lett.",
volume = "133",
number = "25",
pages = "251003",
year = "2024"
}

@article{Sabogal:2024yha,
author = "Sabogal, Miguel A. and Silva, Emanuelly and Nunes, Rafael C. and Kumar, Suresh and Di Valentino, Eleonora and Giar{\`e}, William",
title = "{Quantifying the S8 tension and evidence for interacting dark energy from redshift-space distortion measurements}",
eprint = "2408.12403",
archivePrefix = "arXiv",
primaryClass = "astro-ph.CO",
doi = "10.1103/PhysRevD.110.123508",
journal = "Phys. Rev. D",
volume = "110",
number = "12",
pages = "123508",
year = "2024"
}

@article{Silva:2025hxw,
author = "Silva, Emanuelly and Sabogal, Miguel A. and Scherer, Mateus and Nunes, Rafael C. and Di Valentino, Eleonora and Kumar, Suresh",
title = "{New constraints on interacting dark energy from DESI DR2 BAO observations}",
eprint = "2503.23225",
archivePrefix = "arXiv",
primaryClass = "astro-ph.CO",
doi = "10.1103/qqc6-76z4",
journal = "Phys. Rev. D",
volume = "111",
number = "12",
pages = "123511",
year = "2025"
}

Support

If you encounter any issues with the code or would like to report a bug, please contact me at miguel.sabogalgarcia@unitn.it (Università di Trento).

Current CLASS version: 3.3.4