Holographic Photon-Entropy Coupling and DESI DR2: Direct Validation of -Derived Cosmological Predictions

We present a direct comparison between the holographic impedance framework (Septiyani 2026) and DESI Data Release 2 (2025) baryon acoustic oscillation measurements, alongside the Dark Energy Survey (DES) Y6 results released January 2026. The framework predicted six falsifiable observables from fundamental constants alone: (i) Hubble tension magnitude = 8. 54\% (Observed: 8. 43\%), (ii) dark energy timescale ₄₅₅ = 1/ (^3/2H₀) = 22. 41 Gyr, (iii) the baseline equation of state w₀ = -0. 744 (DESI: -0. 752 0. 057), representing a 0. 14 agreement, (iv) matter density ₘ = 0. 308, (v) expansion rate enhancement H/H = +1. 15\% at z 2, and (vi) phantom crossing at z 0. 70 (DESI LRG2 match). Crucially, this Version 6 (V6) utilizes the pure value ^3/2 0. 00062337 without rounding or external adjustment, preserving the zero-free-parameter integrity of the framework. We demonstrate that the precise value ₄₅₅ = 22. 41 Gyr naturally predicts a deceleration of expansion in the range z 0. 955, 1. 484, consistent with independent model-independent findings (Yang et al. 2026). This work constitutes evidence for electromagnetic coupling to holographic entropy, resolving high-redshift discrepancies through topological dual-channel corrections.