A Periodically Interacting Dark Sector: Signatures and Constraints from CMB and Cosmic Expansion Data

arXiv:2607.26174 · astro-ph.CO, gr-qc, hep-ph, hep-th · Submitted 2026-07-28 · Read on arXiv

Marco Antonio Cardoso Alvarez, Micol Benetti, Leila Graef, Robert Brandenberger

astro-ph.CO, gr-qc, hep-ph, hep-th

Submitted: 2026-07-28

Comments: 22 pages, 05 figures and 01 table

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Quintessence — 6× in this paper · explained in 2 episodes
• Anisotropy — 3× in this paper · explained in 3 episodes
• Cosmic Microwave Background — 3× in this paper
• Baryon Acoustic Oscillation — 2× in this paper
• Clustering — 2× in this paper · explained in 2 episodes
• Cosmic Linear Anisotropy Solving System — 2× in this paper
• Hubble Tension — 2× in this paper · explained in 9 episodes
• Integrated Sachs-Wolfe — 2× in this paper
• Gravitational Lensing — 1× in this paper · explained in 2 episodes
• Monte Carlo Markov Chain — 1× in this paper
• N-body simulations — 1× in this paper · explained in 2 episodes
• Weak Lensing — 1× in this paper · explained in 2 episodes

Sources

• Growing Matter
• Probing the sign-changeable interaction between dark energy and dark matter with DESI baryon acoustic oscillations and DES supernovae data
• Dark Matter and Dark Energy Interactions: Theoretical Challenges, Cosmological Implications and Observational Signatures
• Cosmological Evolution With Interaction Between Dark Energy And Dark Matter
• Large-scale instability in interacting dark energy and dark matter fluids
• Interacting dark energy in the early 2020s: a promising solution to the $H_0$ and cosmic shear tensions
• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• Cosmological constraints on parametrized interacting dark energy
• Tale of stable interacting dark energy, observational signatures, and the $H_0$ tension
• New tests of dark sector interactions from the full-shape galaxy power spectrum
• Dark sector interactions in light of weak lensing data
• Dark sector interactions and the curvature of the Universe in light of Planck's 2018 data
• J-PAS: forecasts on interacting vacuum energy models
• Looking for interactions in the cosmological dark sector
• Dark Energy in the DESI Era: A Brief Review of Evidence, Beyond- CDM Interpretations, and Tensions
• Robust Preference for Dark Sector Interactions
• Back-Reaction of Super-Hubble Cosmological Perturbations Beyond Perturbation Theory
• Dynamical dark energy in light of the latest observations
• Non-parametric dark energy reconstruction using the tomographic Alcock-Paczynski test
• Testing an oscillatory behavior of dark energy

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