A Rational Target for Dynamical Dark Energy: w0=-27/28, wa=-1/28

Abstract

A short, dated, deliberately falsifiable bet placed before the next generation of dark-energy data arrives. In the Chevallier–Polarski–Linder parameterisation w(a) = w₀ + wₐ(1−a), the finite-QEC framework predicts a single rational point — w₀ = −27/28 ≈ −0.964, wₐ = −1/28 — equivalently the one-line law w(a) = −1 + a/28: a mild, non-phantom (w > −1 today, wₐ < 0) thawing-like departure from ΛCDM that returns to exactly −1 in the early universe (the high-redshift density is only e^(3/28) ≈ 1.113× today's, so this is not an early-dark-energy model). The number 27/28 is not fitted to DESI, Euclid, Planck or supernova data — it is fixed in advance by the same 28-channel service clock that sets the scalar tilt n_s = 27/28, written down here so the surveys now running can refute it. The branch dies if a flat CPL reconstruction excludes the point at high significance — whether the data settle on constant w = −1, a robust phantom w < −1, or a drift much larger than 1/28. Explicit about tiers: a posterior landing near the point would not by itself prove the framework (CPL constraints are model- and prior-dependent), but it would make the 28-channel reading much harder to dismiss as numerology.

Keywords

How to cite

Elliman, D. (2026). A Rational Target for Dynamical Dark Energy: w0=-27/28, wa=-1/28. Neuro-Symbolic Ltd technical report. https://doi.org/10.5281/zenodo.21128727

@techreport{elliman2026darkenergyprediction,
  author      = {Elliman, David},
  title       = {A Rational Target for Dynamical Dark Energy: w0=-27/28, wa=-1/28},
  institution = {Neuro-Symbolic Ltd},
  year        = {2026},
  doi         = {10.5281/zenodo.21128727},
  url         = {https://neusym.ai/papers/dark_energy_prediction}
}