Relaxation-Driven Cyclic Cosmology (RDCC) v12.0: Precision Predictions, Multi-Probe Confrontation, and Quantum-Geometric Completion

Relaxation-Driven Cyclic Cosmology (RDCC) v12. 0: Precision Predictions, Multi-Probe Confrontation, and Quantum-Geometric Completion This major release unifies RDCC into a precision, data-confronted framework: full RDCC--CLASS integration (background, perturbations, mirror-Boltzmann hierarchy, CMB/matter power spectra), multi-probe confrontation (CMB + LSS + GW + 21-cm + high-z galaxies), quantum-geometric completion (bounce--BH duality with shared metric and information flow), galaxy formation model (calibrated against IllustrisTNG/EAGLE/FIRE), and 21-cm reionization simulations (bubble size distribution, cross-correlations). The nonsingular, eternally cyclic model uses a single effective complex scalar field Φ in a tilted double-well potential, driving dynamic dark energy (wDE > -1) and eternal cycles. A CPT-conjugate mirror sector provides cold dark matter and resolves baryon asymmetry (ηB ≈ 6. 1×10^-10, ΩDM/Ωb ≈ 5. 38). Falsifiability: No GW echo population (LISA/LIGO), no subhalo suppression (Euclid/JWST), no 21-cm flattening (SKA/HERA), S₈ mismatch (Euclid), ΔNₑff > 0. 1 (CMB-S4/BBN). This version builds on: Relaxation-Driven Cyclic Cosmology (RDCC) v1. 0: A Minimal Eternal Framework and Its Dynamical Realization: https: //zenodo. org/records/18281686 Relaxation-Driven Cyclic Cosmology (RDCC) v2. 0: A Minimal Eternal Framework with Dynamical Realization and Extensions: https: //zenodo. org/records/18304744 Relaxation-Driven Cyclic Cosmology (RDCC) v5. 0: Bounce-Matching Formalism, Mirror-Sector Dynamics, and Refined Gravitational Waves: https: //zenodo. org/records/18307836 Relaxation-Driven Cyclic Cosmology (RDCC) v6. 0: Black Hole Bounces as Local CPT-Fixpoints, Full Perturbation Transfer Matrix and Mirror-Sector Microphysics: https: //zenodo. org/records/18312656 Relaxation-Driven Cyclic Cosmology (RDCC) v7. 0: Quantum-Corrected Black Hole Bounces, Full Perturbation Transfer Matrix with Phase-Shift, and Mirror Microphysics https: //zenodo. org/records/18327084 Relaxation-Driven Cyclic Cosmology (RDCC) v8. 0: Parameter Space Exploration, Data Confrontation, and Predictive Structure Formation https: //zenodo. org/records/18334398 Relaxation-Driven Cyclic Cosmology (RDCC) v9. 0: Predictive Cosmology, Nonlinear Structure Formation, and Astrophysical Signatures https: //zenodo. org/records/18336237 Relaxation-Driven Cyclic Cosmology (RDCC) v10. 0: Unified Cosmology, Full Simulations, and Observational Pipelines https: //zenodo. org/records/18336865 Relaxation-Driven Cyclic Cosmology (RDCC) v11. 0: Entropy Dynamics, Mirror Thermodynamics, EFT Consistency, and Naturalness https: //zenodo. org/records/18341147 While the core of RDCC remains a structural, timeless framework with fixpoint character, this document explores a dynamical realization of the bounce mechanism to enable concrete, falsifiable predictions. Related documents and the full RDCC ecosystem are available via Zenodo: https: //zenodo. org/records/18204087 Michael Lehmannmi. lehmann@gmx. de