Relaxation-Driven Cyclic Cosmology v2.0: A Minimal Eternal Framework with Dynamical Realization and Extensions

Version 2.0 of Relaxation-Driven Cyclic Cosmology (RDCC) – a nonsingular, eternally cyclic cosmological framework based on a single complex scalar field Φ in a tilted double-well potential.

This version extends v1.0 with:
- Detailed dynamical realization of the bounce mechanism (Klein-Gordon + FRW equations, NEC violation, numerical bounce evolution)
- Refined predictions for stochastic gravitational waves (peaked spectrum at ~5 mHz, LISA-testable)
- Late-time Integrated Sachs-Wolfe excess (~12% low-ℓ CMB power)
- Primordial perturbations (n_s ≈ 0.964, A_s ≈ 2.1×10^{-9}, Planck-compatible)
- Baryogenesis and DM/baryon ratio (η_B ≈ 6.1×10^{-10}, Ω_DM/Ω_b ≈ 5.38)
- Extensions: Black holes as mini-bounces, quantum entanglement interpretation, core-cusp resolution, 21-cm signals, UV-stability, mirror sector parameterization, and finer GW analysis

The model avoids inflation, modified gravity, and fine-tuning. Global CPT symmetry is preserved, with a mirror sector providing effective dark matter.

Plots for bounce dynamics and GW spectrum are planned for a future update (v2.1).

All extensions remain consistent with the structural, timeless core of RDCC.

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