DESI Confrontation and Zero-Parameter Cosmological Scorecard
Systematic observational tests of the entanglement entropy framework
Confronts the entanglement framework with all available cosmological data including DESI DR1/DR2. Shows the 4.5σ w₀ tension is entirely supernova-driven — DESI BAO data alone prefers w = −1.
Mar 5, 2026 · Preprint
Plain English
This paper stress-tests the dark energy prediction against every major cosmological dataset — and finds the biggest threat comes from supernovae, not from the DESI experiment itself.
The problem
The entanglement entropy framework predicts w = −1 exactly (dark energy is a pure cosmological constant). But the DESI experiment reports w₀ = −0.75 ± 0.06, a 4.5σ tension. Is the framework already dead?
The key idea
Not all data are created equal. The paper dissects the DESI result and discovers that the tension comes entirely from Type Ia supernova calibration — not from DESI's own baryon acoustic oscillation measurements. When DESI BAO data is analyzed alone, it actually prefers w = −1 over DESI's own best-fit model.
What the paper does
It constructs a comprehensive scorecard testing the framework against Planck CMB, DESI BAO, multiple supernova compilations, and local H₀ measurements. It identifies the supernova magnitude offset as the critical systematic and shows that a 0.04-magnitude shift (within known calibration uncertainties) resolves the entire tension.
Why it matters
The framework is not dead — it is being seriously tested for the first time. The scorecard defines clear falsification criteria: if DESI DR3 (expected ~2027) confirms w₀ ≠ −1 at >5σ using BAO data alone (without supernovae), the framework is falsified. Until then, the tension is a calibration question, not a physics question.
What could go wrong
If the supernova calibration is correct and DESI DR3 confirms the tension with BAO-only data, the entire entanglement framework is falsified — including all gauge group predictions, generation counting, and BSM exclusions. The paper is explicit about this existential risk.