Relaxation-Driven Cyclic Cosmology (RDCC) v19.0 - Minimal Effective Two-Sector Version

Relaxation-Driven Cyclic Cosmology (RDCC) v19. 0 – Minimal Effective Two-Sector Version This updated version includes a new numerical demonstration of the nonsingular cosmological bounce (Figure 1), generated with the accompanying Python script. The simulation shows a clear contraction → bounce at finite aₘin ≈ 0. 452 → expansion over long time scales (t up to 500), with bounded energy density and regular curvature invariants, fully consistent with Sections 6 and 11. The Python code (RDCCbounceₛimulatorᵥ19. py) is provided as supplementary material for full reproducibility of Figure 1. All previous results (ns ≈ 0. 964, dark matter abundance, baryon asymmetry, multi-cycle stability, etc. ) remain unchanged. 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 Relaxation-Driven Cyclic Cosmology (RDCC) v12. 0: Precision Predictions, Multi-Probe Confrontation, and Quantum-Geometric Completion https: //zenodo. org/records/18346555 Relaxation-Driven Cyclic Cosmology (RDCC) v13. 0: Quantum Completion, Global Consistency, and Predictive Cosmology https: //zenodo. org/records/18348450 Relaxation-Driven Cyclic Cosmology (RDCC) v14. 0: Unified Quantum Gravity, Full-Cycle Simulation, and Multi-Messenger Precision Cosmology https: //zenodo. org/records/18351916 Relaxation-Driven Cyclic Cosmology (RDCC) v15. 0: Mirror-Sector Cosmology, Hidden-Universe Gravitational Waves, and Two-Sector Evolution https: //zenodo. org/records/18358095 Relaxation-Driven Cyclic Cosmology (RDCC) v16. 0: Precision Two-Sector Dynamics, Mirror Thermodynamics Refinements, and Enhanced GW Forecasts https: //zenodo. org/records/18388123 Relaxation-Driven Cyclic Cosmology (RDCC) v17. 0 - Minimal Effective Two-Sector Version https: //zenodo. org/records/18761806 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