Relaxation-Driven Cyclic Cosmology (RDCC) v1.18 A Minimal Eternal Model with Emergent Tilt, CPT-Conjugate Mirror Sector, Natural Resolution of the Hubble Tension, and Distinctive Stochastic GW Background

Relaxation-Driven Cyclic Cosmology (RDCC) v1.18 A minimalist eternal cyclic cosmological model based on a single complex scalar field in a tilted double-well potential with emergent tilt from Coleman-Weinberg radiative corrections. New in v1.18 (December 26, 2025):- Formal justification of the stochastic gravitational-wave background (SGWB) spectral shape directly from the nonsingular bounce dynamics (three regimes: f^3 rise, near-flat peak, f^{-2} fall).- Explicit comparison of RDCC's peaked SGWB with the nearly scale-invariant inflationary background, highlighting distinguishability.- Updated Hubble tension discussion referencing latest 2025 data (DESI DR2, JWST) and schematic consistency with observations. RDCC remains strictly minimalist: one field, standard gravity, no new particles, no modified gravity, no inflation required. Key solved puzzles: dark energy (evolving w_DE > -1 resolving Hubble tension), dark matter (CPT-conjugate mirror sector with anti-correlated perturbations solving core-cusp), baryon asymmetry, DM/baryon ratio ≈5.4, neutrino masses as CPT effects, nonsingular cosmology (bounce + black holes as mini-bounces), entropy/initial conditions. Primary testable predictions:- Enhanced late-time ISW (~12% low-ℓ excess in CMB)- Distinctive peaked stochastic GW background (f_peak ~ 10^{-3}–10^{-2} Hz, potentially detectable by LISA)- 21-cm signal modulations (high-z, SKA-testable)- Mild small-scale power suppression Previous version: v1.17 (DOI: 10.5281/zenodo.18052958)