Relaxation-Driven Cyclic Cosmology (RDCC) is a nonsingular, eternally cyclic cosmological model based on a single effective complex scalar order-parameter field Φ evolving in a tilted double-well potential. The tilt emerges from radiative Coleman–Weinberg corrections, requiring no ad-hoc parameters. Field relaxation drives time-varying vacuum energy, generating alternating phases of accelerated expansion and contraction in an eternal "breathing" cycle. A gravitationally coupled CPT-conjugate mirror sector with reversed thermodynamic arrow provides cold dark matter and resolves baryon asymmetry via phase-induced mechanisms, preserving global CPT symmetry exactly. The model operates as an effective field theory on cosmological scales, avoiding singularities, entropy divergence, flatness problems, and the need for inflation or modified gravity. Key predictions include ~12% excess in low-ℓ CMB Integrated Sachs–Wolfe effect, primordial perturbations from the bounce (nₛ ≈ 0. 964, Aₛ ≈ 2. 1×10^-9, Planck-kompatibel), peaked GW spectrum (~5 mHz, ΩGW h² ~10^-10–5×10^-9, LISA-testbar), small-scale suppression, and 21-cm modulations. v5. 0 upgrades: - Formal CPT-symmetric bounce-matching for scalar/tensor perturbations (preserves scale-invariance, introduces tensor knick structure). - Dynamic mirror-sector evolution (temperature T_-, decoupling, ΔNₑff -1, wₐ 0. 1 (BBN/CMB), incorrect ηB or ΩDM/Ωb. Full LaTeX source and code in Appendix. Builds on v4. 0 (Zenodo 10. 5281/zenodo. 18304744) and v3. 0 (10. 5281/zenodo. 18281686). 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
Michael Lehmann (Tue,) studied this question.