Relaxation-Driven Cyclic Cosmology (RDCC) – Unified Framework and Definitive Synthesis

Relaxation-Driven Cyclic Cosmology (RDCC) is a minimalist, eternally cyclic cosmological framework based on standard Einstein gravity and a single complex scalar field Φ in a tilted double-well potential (emergent tilt from Coleman-Weinberg corrections). It unifies dark energy (dynamic vacuum relaxation, w > −1), dark matter (CPT-conjugate mirror sector), baryon asymmetry, and nonsingular bounce dynamics in a globally CPT-symmetric, timeless spacetime with sectoral projections. This document presents the definitive synthesis of RDCC, consolidating formal axioms, cross-sector transfers, multi-cycle stability, emergent phenomena, Higgs fusion integration, and testable predictions (enhanced ISW excess, peaked stochastic GW background, 21-cm modulations). It is fully standalone and self-contained, explaining all concepts from first principles. No inflation, modified gravity, or additional fields required. Builds upon and supersedes previous iterations in the RDCC series. Testable with upcoming missions (LISA O4, Einstein Telescope, SKA Phase 2, CMB-S4, Advanced PTA). Focus: minimalism, CPT symmetry, long-term stability, and sectoral consistency. Related documents and the full RDCC ecosystem are available via Zenodo:https://zenodo.org/records/18204087 Michael Lehmann Independent Researcher mi.lehmann@gmx.de