Psi-Continuum v2
A minimal one-parameter phenomenological extension of the ΛCDM cosmological model
Author: Dmitry V. Klimov
Status: Final archived research release (v0.2.3)
Overview
Psi-Continuum v2 (ΨCDM) is a minimal background-level extension of the standard
ΛCDM cosmological model.
It introduces a single dimensionless late-time deformation parameter ε₀
while not introducing any modifications to early-Universe physics
or standard perturbation dynamics.
The model is designed for transparent, reproducible testing of late-time cosmological expansion using modern observational datasets.
This repository represents the final archived software release associated with the Psi-Continuum v2 publication.
Model Definition
The modified Hubble expansion rate is defined as:
H_Ψ(z) = H_Λ(z) · (1 + ε₀ / (1 + z))
Properties of the parametrisation:
- Exact recovery of ΛCDM when ε₀ = 0
- Percent-level deviations only at low redshift
- Suppressed modifications as z → ∞
- No impact on early-Universe observables (CMB, primordial BAO)
Installation
Install the package from PyPI:
pip install psi-continuum-v2
Important notes
- Scientific datasets are not included in the PyPI package.
- Generated results (
results/) are not included. - All datasets must be downloaded separately using the built-in tools.
Command-Line Interface (CLI)
Psi-Continuum v2 provides an interactive and scriptable CLI.
Interactive menu
psi-cli
Menu options include:
- Download datasets
- Check datasets
- Run full analysis pipeline
- Open documentation
- Show project paths
Built-in commands
Download all required datasets:
psi-download-data
Verify dataset integrity and paths:
psi-check-data
Run the complete analysis pipeline:
psi-run-all
These commands reproduce all numerical results and figures reported in the Psi-Continuum v2 publication.
Documentation and Source Code
- Documentation: https://psi-continuum.org/docs/v2
- Source code: https://github.com/dmitrylife/psi-continuum-v2
Publications and DOIs
-
Psi-Continuum v2 preprint:
DOI: https://doi.org/10.5281/zenodo.17879744 -
Psi-Continuum v2 software archive:
DOI: https://doi.org/10.5281/zenodo.17928837
Project Status
This is a final archived research release.
The codebase is frozen and preserved for long-term reproducibility and citation. Future developments of the Psi-Continuum framework will be released as separate repositories and publications.
Contact
Dmitry V. Klimov
Email: d.klimov.psi@gmail.com
Website: https://psi-continuum.org
1 maintainer
Metadata
1 maintainer
Release files for psi-continuum-v2 0.2.3
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