Relaxation-Driven Cyclic Cosmology (RDCC) v15.0: Mirror-Sector Cosmology, Hidden-Universe Gravitational Waves, and Two-Sector Evolution

Relaxation-Driven Cyclic Cosmology (RDCC) v15.0: Mirror-Sector Cosmology, Hidden-Universe Gravitational Waves, and Two-Sector Evolution

This release advances RDCC into a unified, testable two-sector cosmology. Building on v14.0 (quantum-gravity consistency and multi-cycle stability), v15.0 introduces:

- A full cosmological model of the CPT-conjugate mirror sector (Mirror-Sector Cosmology v1.0): temperature ratio T-/T+ < 1, mirror recombination/CMB, mirror BBN (ΔNeff < 0.1), early matter domination, enhanced structure formation (mirror galaxies, stars, SMBHs), and the mirror sector as a dynamically old universe (effective age τ- ≲ 5 Gyr) serving as entropy regulator.
- A dedicated Mirror Gravitational Wave Program v1.0: stochastic background Ω_GW^- ~ 10^{-10}–10^{-8} in PTA/LISA bands, phenomenological merger rates R-(z) calibrated to small-scale suppression in visible CDM (dwarf-galaxy counts, subhalo mass functions), and signatures like GW events without electromagnetic counterparts and uncorrelated SGWB components.
- Second-generation bounce–black-hole duality v2.0: mapping cosmological bounce to BH interiors, local mini-bounces, entanglement flow between visible and mirror sectors, and stability across cycles.
- Two-sector upgrades: Boltzmann hierarchies, N-body structure formation, multi-cycle co-evolution, RDCC-CLASS v4.0, multi-messenger forecasts (LISA, PTA, SKA, JWST/ELT, CMB-S4), eight-dimensional parameter space, observational pipeline, and simulation suite.

RDCC remains a minimal, nonsingular, eternally cyclic framework based on a single complex scalar field Φ in a tilted double-well potential (Coleman-Weinberg tilt), with global CPT symmetry preserved via the mirror sector. It resolves baryon asymmetry, provides cold dark matter, and addresses ΛCDM tensions (H0, S8, evolving dark energy from DESI DR2) without inflation or modified gravity.

This version positions RDCC as a fully testable paradigm for the 2035–2040 era, with clear falsifiability criteria (e.g., absence of mirror-GW mismatches, ΔNeff > 0.1, or no bounce imprint in SGWB).

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

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 Lehmann
mi.lehmann@gmx.de