Cited by 200Black Holes and Theoretical PhysicsCosmology and Gravitation TheoriesNoncommutative and Quantum Gravity Theories

Transplanckian axions!?

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Montero, Miguel, Uranga, Angel M., Valenzuela, Irene·2015·Journal of High Energy Physics

Abstract

We discuss quantum gravitational effects in Einstein theory coupled to periodic axion scalars to analyze the viability of several proposals to achieve superplanckian axion periods (aka decay constants) and their possible application to large field inflation models. The effects we study correspond to the nucleation of euclidean gravitational instantons charged under the axion, and our results are essentially compatible with (but independent of) the Weak Gravity Conjecture, as follows: single axion theories with superplanckian periods contain gravitational instantons inducing sizable higher harmonics in the axion potential, which spoil superplanckian inflaton field range. A similar result holds for multi-axion models with lattice alignment (like the Kim-Nilles-Peloso model). Finally, theories with N axions can still achieve a moderately superplanckian periodicity (by a $$ \sqrt{N} $$ factor) with no higher harmonics in the axion potential. The Weak Gravity Conjecture fails to hold in this case due to the absence of some instantons, which are forbidden by a discrete Z N gauge symmetry. Finally we discuss the realization of these instantons as euclidean D-branes in string compactifications.

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Crossref · 10.1007/jhep08(2015)032

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  • For effective axions with f > M_P, wormholes could in principle have a sizeable impact in the inflaton potential.

    “For (effective) axions with f > M P , this is relevant in the context of large-field inflation, where wormholes could in principle have a sizeable impact in the inflaton potential (Montero et al., 2015;Hebecker et al., 2017).”

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Authors
Montero, M., Uranga, A. M., & Valenzuela, I.
Affiliations
Consejo Superior de Investigaciones Científicas (ES)
Corresponding author
Montero, Miguel
Venue
Journal of High Energy Physics
Published
2015-08
Volume
2015
Issue
8
ISSN
1029-8479 (ISSN-L)
OpenAlex
W3037732995
Cited by
200
References
101
Citations by year
2026: 4 · 2025: 11 · 2024: 6 · 2023: 9 · 2022: 13 · 2021: 18 · 2020: 20 · 2019: 31 · 2018: 32 · 2017: 27 · 2016: 18 · 2015: 11
FWCI
14.70
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Journal of High Energy Physics (publishedVersion, cc-by)
  • LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (publishedVersion)
  • Tesis Doctorals en Xarxa (Consorci de Serveis Universitaris de Catalunya) (acceptedVersion, cc-by)
  • arXiv (Cornell University) (submittedVersion)
  • Hispana (submittedVersion)
  • Biblos-e Archivo (Universidad Autónoma de Madrid) (submittedVersion, public-domain)
  • arXiv (Cornell University)
Funders
FP7 Ideas: European Research Council (320421)
Topics
  • Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Black Holes and Theoretical Physics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Cosmology and Gravitation Theories
  • Physical Sciences › Physics and Astronomy › Statistical and Nonlinear Physics › Noncommutative and Quantum Gravity Theories
Keywords
axions, large-field inflation, quantum gravity, gravitational instantons, Euclidean instantons, weak gravity conjecture, lattice alignment, D-branes, string compactification

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