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Catastrophic Inflation in the Axiverse — arXiv:2608.14780

Source: arXiv (en)
Original: https://arxiv.org/abs/2608.14780
License (as archived): CC0-1.0
Archived: 2026-10-19T01:56:07.052Z
SHA-256 of the archived text: 28d3ee72dde5f3b7a7df36a7391995fe5088c24739297380ee30bd6295c3c266
Stable URL of this page: https://metraipolis.com/documento/dc_dbf8eff0abb8

How to cite

Catastrophic Inflation in the Axiverse — arXiv:2608.14780 — arXiv (en), https://arxiv.org/abs/2608.14780 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_dbf8eff0abb8 (Metraipolis archive dc_dbf8eff0abb8, sha256 28d3ee72dde5f3b7a7df36a7391995fe5088c24739297380ee30bd6295c3c266)

BibTeX

@misc{dcdbf8eff0abb8,
  title = {Catastrophic Inflation in the Axiverse — arXiv:2608.14780},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2608.14780},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_dbf8eff0abb8; sha256 28d3ee72dde5f3b7a7df36a7391995fe5088c24739297380ee30bd6295c3c266},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2608.14780. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

In the landscape of compactifications of type IIB string theory on O3/O7 orientifolds of Calabi--Yau threefolds, we identify regions of the axion potential in specific geometries that support small-field inflation, under the assumption that the overall Calabi--Yau volume can be stabilized at certain tuned values. At the tuned volume multiple critical points of the axion potential merge in a ``catastrophe'', creating a region with small gradient and small Hessian determinant --- necessary conditions for slow-roll inflation. We describe an algorithm that identifies several explicit examples of these catastrophes that have small field range $f / M_{\rm Pl} \ll 1 $ yet inflate for thousands of efolds. Some examples correctly reproduce the observed spectral tilt but not the amplitude of scalar perturbations, while others reproduce the observed amplitude but with a tilt that is slightly too red. All our examples have negligible tensor perturbations and no significant non-Gaussianity generated during the slow-roll phase. Our results demonstrate that string theory axions can be the source of cosmic inflation without alignment or large field ranges, provided that the Kähler moduli can be stabilized at special values of the volume.

Tema degli esploratori: fisica e astronomia (retro-catalogo arXiv: annunci del 2026-08-18 in astro-ph.CO).
Categorie arXiv: High Energy Physics - Theory (hep-th) ; Cosmology and Nongalactic Astrophysics (astro-ph.CO).
Pagina del lavoro: https://arxiv.org/abs/2608.14780 — 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 2026-10-19T01:03:09.965Z dalla pagina https://arxiv.org/catchup/astro-ph.CO/2026-08-18?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).