Relaxation‑Driven Cyclic Cosmology (RDCC) v36. 0 presents the complete, updated collection of all core and companion papers that define the RDCC research program. RDCC is a minimal, one‑parameter, CPT‑symmetric cosmological framework in which the thermodynamic arrow of time, the nonsingular bounce, the structure of the dark sector, and all observable deviations from ΛCDM arise from a single infrared relaxation parameter. Version v36. 0 introduces the finalized Companion Papers I–V and the extended conceptual supplement “RDCC – Speculative Extensions & Conceptual Companions. ” Together, these documents consolidate the theoretical foundations, perturbation structure, tensor phenomenology, relaxation dynamics, global CPT state, and observational predictions of the RDCC framework. New in v36. 0: • Companion I – Gravity as the Global Bridge Refines the role of gravity as the unique interaction coupling both sectors and formalizes the interpretation of dark matter as a gravitational shadow of the mirror sector. • Companion II – Tensor Interference and Log‑Periodic Gravitational Waves Strengthens the derivation of tensor‑sector interference and the resulting log‑periodic modulation of the stochastic gravitational‑wave background. • Companion III – Relaxation Dynamics and the Scalar Sector Provides a systematic derivation of the scalar spectral tilt relation nₛ − 1 = −2αIR and clarifies the role of relaxation dynamics in generating near scale invariance. • Companion IV – The Global CPT State and the Mirror Sector Develops the bipartite Hilbert‑space structure, entropy flow, and the emergence of sectoral thermodynamic arrows of time within a globally CPT‑symmetric state. • Companion V – Observational Synthesis and Global Fit Includes two major structural additions introduced in v36. 0: – The RDCC Core Prediction Box, summarizing the four key observables and their one‑parameter correlation structure. – The Likelihood Architecture Box, providing a clear operational blueprint for the upcoming global fit across CMB, LSS, and gravitational‑wave data. • RDCC – Speculative Extensions & Conceptual Companions Collects forward‑looking ideas, conceptual extensions, and optional theoretical directions beyond the minimal RDCC framework. Contents of the v36. 0 release: 1. RDCC v36. 0 – A CPT‑Symmetric, Two‑Sector, Bounce‑EFT Framework 2. Companion I – Gravity as the Global Bridge 3. Companion II – Tensor Interference and Log‑Periodic Gravitational Waves 4. Companion III – Relaxation Dynamics and the Scalar Sector 5. Companion IV – The Global CPT State and the Mirror Sector 6. Companion V – Observational Synthesis and Global Fit 7. RDCC – Speculative Extensions & Conceptual Companions RDCC v36. 0 is the first fully consolidated and structurally sharpened release of the entire RDCC program. It prepares the ground for the next phase of the project: the numerical implementation of the global fit and the empirical confrontation of RDCC with current and upcoming cosmological observations. Related documents and the full RDCC ecosystem are available via Zenodo: https: //zenodo. org/records/18204087 Michael Lehmannmi. lehmann@gmx. de
Michael Lehmann (2026) studied this question.