Cosmological Constant Workbench

A reproducible, test-first workbench for the cosmological constant problem:

• Reproduce the baseline discrepancy between naive QFT vacuum energy estimates and the observed dark-energy density.
• Provide small, explicit calculators (with units) and a CLI that outputs JSON.
• Create a place to evaluate candidate mechanisms by their assumptions and their observable consequences, not by curve-fitting.
• Integrate external LQG-inspired predictors and perform bounded parameter scans to establish empirical constraints (e.g., 150+ order mismatch demonstrated in papers/lqg_cc_constraints).

Quick start

cd cosmological-constant-workbench
python -m venv .venv && source .venv/bin/activate
pip install -e .

# Baseline: observed ρ_Λ, Λ, and naive QFT cutoffs
ccw-baseline --h0 67.4 --omega-lambda 0.6889 --cutoff planck
ccw-baseline --cutoff electroweak
ccw-baseline --cutoff 1TeV

# Sweep toy mechanism parameters (writes JSON + CSV)
ccw-sweep --mechanism cpl --z 0,1,2 --grid-json '[{"w0":-1.0,"wa":0.2},{"w0":-0.9,"wa":0.0}]'

What this repo is (and isn’t)

• This is not a claim of a solved cosmological constant problem.
• It is a rigorous, incremental environment to (1) reproduce the problem, (2) encode assumptions in code, and (3) compare mechanisms against constraints.

Repository layout

• src/ccw/ — library code
• scripts/ — runnable scripts (thin wrappers)
• tests/ — unit tests (pytest)
• docs/ — roadmap, notes, and provenance

Next steps

See docs/TASKS.md for the working task list.

Provenance

See docs/PROVENANCE.md for equation provenance and scope.