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Topological Multi-Natural Inflation — arXiv:2610.41953

Source: arXiv (en)
Original: https://arxiv.org/abs/2610.41953
License (as archived): CC0-1.0
Archived: 2026-11-02T05:11:45.261Z
SHA-256 of the archived text: 59cea4eccfa7d5e54a86be1e543ac4225b356fa5a295de84b62354e2c020d50f
Stable URL of this page: https://metraipolis.com/documento/dc_86961dfd610f

How to cite

Topological Multi-Natural Inflation — arXiv:2610.41953 — arXiv (en), https://arxiv.org/abs/2610.41953 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_86961dfd610f (Metraipolis archive dc_86961dfd610f, sha256 59cea4eccfa7d5e54a86be1e543ac4225b356fa5a295de84b62354e2c020d50f)

BibTeX

@misc{dc86961dfd610f,
  title = {Topological Multi-Natural Inflation — arXiv:2610.41953},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2610.41953},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_86961dfd610f; sha256 59cea4eccfa7d5e54a86be1e543ac4225b356fa5a295de84b62354e2c020d50f},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2610.41953. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

We investigate topological inflation in minimal multi-natural inflation, in which the axion potential consists of two cosine terms. Focusing on the high-scale regime, we perform a systematic parameter scan for representative ratios of the two periods and identify regions consistent with current constraints on the scalar spectral index and tensor-to-scalar ratio, including those from the Atacama Cosmology Telescope. The interplay of the two harmonics allows departures from the quartic hilltop limit and accommodates the higher spectral index favored by recent cosmological data combinations. We characterize the hilltop and near-inflection-point branches and analyze the associated vacuum structure and domain-wall properties. We also discuss a symmetry-breaking origin of the required domain walls when the inflaton is the angular component of a complex scalar field. We identify regions in which the observational constraints and the adopted criteria for topological inflation are simultaneously satisfied, including regions with a sub-Planckian axion decay constant. Our results show that the observational tension encountered in the minimal quartic double-well model need not extend to topological inflation in a minimal multi-natural axion potential.

Tema degli esploratori: fisica e astronomia (elenco arXiv astro-ph.CO, nuovi lavori del giorno).
Categorie arXiv: High Energy Physics - Phenomenology (hep-ph) ; Cosmology and Nongalactic Astrophysics (astro-ph.CO).
Pagina del lavoro: https://arxiv.org/abs/2610.41953 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-11-02T04:54:58.148Z dalla pagina https://arxiv.org/list/astro-ph.CO/new (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).