Holographic Photon-Entropy Coupling and DESI DR2: Direct Validation of α-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 √α = 8.54% (Observed: 8.43%),(ii) dark energy timescale τeff = 1/(α3/2H_0) = 22.41 Gyr,(iii) the baseline equation of state w_0 = -0.744 (DESI: -0.752 ± 0.057), representing a 0.14σ agreement,(iv) matter density Ω_m = 0.308,(v) expansion rate enhancement Δ 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 α3/2 ≈ 0.00062337 without rounding or external adjustment, preserving the zero-free-parameter integrity of the framework. We demonstrate that the precise value τeff = 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.