Is inflation from unwinding fluxes IIB?
Is inflation from unwinding fluxes IIB?
In this paper we argue that the mechanism of unwinding inflation is naturally present in warped compactifications of type IIB string theory with local throats. The unwinding of flux is caused by its annihilation against branes. The resulting inflaton potential is linear with periodic modulations. We initiate an analysis of the inflationary dynamics and cosmological observables, which are highly constrained by moduli stabilization. For the simplified model of single-Kähler Calabi-Yau spaces we find that many, though not all of the consistency constraints can be satisfied. Particularly, in this simple model geometric constraints are in tension with obtaining the observed amplitude of the scalar power spectrum. However, we do find 60 efolds of inflation with a trans-Planckian field excursion which offers the hope that slightly more complicated models can lead to a fully consistent explicit construction of large field inflation of this kind.
Gautason, Fridrik Freyr
0c48d448-e092-48bf-a310-45862bd6fc5f
Schillo, Marjorie
ef8290b3-15ba-419b-ba85-3600d49b2b97
Van Riet, Thomas
f82c77a1-9588-4814-b5eb-725d5dd77d58
7 March 2017
Gautason, Fridrik Freyr
0c48d448-e092-48bf-a310-45862bd6fc5f
Schillo, Marjorie
ef8290b3-15ba-419b-ba85-3600d49b2b97
Van Riet, Thomas
f82c77a1-9588-4814-b5eb-725d5dd77d58
Gautason, Fridrik Freyr, Schillo, Marjorie and Van Riet, Thomas
(2017)
Is inflation from unwinding fluxes IIB?
JHEP, 2017, [37].
(doi:10.1007/JHEP03(2017)037).
Abstract
In this paper we argue that the mechanism of unwinding inflation is naturally present in warped compactifications of type IIB string theory with local throats. The unwinding of flux is caused by its annihilation against branes. The resulting inflaton potential is linear with periodic modulations. We initiate an analysis of the inflationary dynamics and cosmological observables, which are highly constrained by moduli stabilization. For the simplified model of single-Kähler Calabi-Yau spaces we find that many, though not all of the consistency constraints can be satisfied. Particularly, in this simple model geometric constraints are in tension with obtaining the observed amplitude of the scalar power spectrum. However, we do find 60 efolds of inflation with a trans-Planckian field excursion which offers the hope that slightly more complicated models can lead to a fully consistent explicit construction of large field inflation of this kind.
Text
JHEP03(2017)037
- Version of Record
More information
Accepted/In Press date: 26 February 2017
Published date: 7 March 2017
Identifiers
Local EPrints ID: 497315
URI: http://eprints.soton.ac.uk/id/eprint/497315
ISSN: 1126-6708
PURE UUID: 43fddaec-cecd-4349-84ab-354cf083e610
Catalogue record
Date deposited: 17 Jan 2025 18:19
Last modified: 22 Aug 2025 02:43
Export record
Altmetrics
Contributors
Author:
Fridrik Freyr Gautason
Author:
Marjorie Schillo
Author:
Thomas Van Riet
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics