Relaxation-Driven Cyclic Cosmology (RDCC) v1.25

Relaxation-Driven Cyclic Cosmology (RDCC) v1.25 Relaxation-Driven Cyclic Cosmology (RDCC) v1.25 presents a minimalist eternal cosmological framework grounded in standard Einstein gravity and a single effective complex scalar field Φ evolving in a softly tilted double-well potential. The tilt ε ∼ 10⁻³–10⁻² emerges naturally from loop-suppressed radiative corrections, providing a minimal structural asymmetry that distinguishes time-oriented sectors within a globally CPT-symmetric spacetime. RDCC is not intended as a phenomenological competitor to ΛCDM, but as a structural framework clarifying how time orientation, entropy growth, dark energy, dark matter (as gravitational coupling to a CPT-conjugate mirror sector), baryon asymmetry, neutrino masses, primordial perturbations, and nonsingular evolution can consistently arise without inflation, modified gravity, or additional fields. This version includes detailed mathematical derivations of the emergent tilt (Coleman–Weinberg mechanism), the CPT-fixpoint bounce, and sectoral time projection. Illustrative background reconstructions are shown to be compatible with current DESI BAO constraints within observational uncertainties. Quantitative illustrations (H(z) evolution, stochastic GW background, ISW effect) are provided for comparison with upcoming Euclid and LISA data. The framework remains strictly minimalist and structurally motivated, distinguishing illustrative reconstructions from fundamental observables. For a broader meta-theoretical perspective on structural limits, see the companion work Perspective–Dual Cosmology (PDK): https://zenodo.org/records/18159786 Previous version (v1.24): https://zenodo.org/record/18100715 Relaxation-Driven Cyclic Cosmology (RDCC) -> Core Framework v1.1 <- -> RDCC - A Structural Manifest <- Lehmann, Michael (Independent Researcher) E-Mail: [email protected]