kth.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Generalised conditions for rapid-turn inflation
Institute Lorentz of Theoretical Physics, Leiden University, Leiden 2333 CA, The Netherlands; Institute for Theoretical Physics, Utrecht University, Utrecht 3584 CE, The Netherlands.
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA. Nordita, Stockholm University, Hannes Alfvéns väg 12, Stockholm 10691, Sweden, Hannes Alfvéns väg 12; The Oskar Klein Centre, Department of Astronomy, Stockholm University, Stockholm 10691, Sweden.ORCID iD: 0000-0002-6222-1664
Institute Lorentz of Theoretical Physics, Leiden University, Leiden 2333 CA, The Netherlands; Department of Theoretical Physics, University of the Basque Country, UPV-EHU, Bilbao 48080, Spain.
2024 (English)In: Journal of Cosmology and Astroparticle Physics, E-ISSN 1475-7516, Vol. 2024, no 7, article id 079Article in journal (Refereed) Published
Abstract [en]

Rapid-turn slow-roll inflationary trajectories have been shown to be an attractor in two-field models, provided the turn rate is near constant and larger than the slow-roll parameters. These trajectories can produce primordial spectra consistent with current observations on CMB scales. We present the generalized consistency condition for sustained rapid-turn inflationary trajectory with two fields, arbitrary field-space metric and potential valid for any value of the turn rate. This has to be supplemented by a second condition to ensure slow roll evolution. Both conditions together constitute a tool to identify inflationary trajectories with arbitrary values of the turning rate without having to solve the equations of motion. We present a Python package for the numerical identification of regions in field-space and parameter space that allow for rapid-turn trajectories.

Place, publisher, year, edition, pages
IOP Publishing , 2024. Vol. 2024, no 7, article id 079
Keywords [en]
inflation, physics of the early universe
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:kth:diva-351913DOI: 10.1088/1475-7516/2024/07/079ISI: 001280936200006Scopus ID: 2-s2.0-85200206586OAI: oai:DiVA.org:kth-351913DiVA, id: diva2:1890129
Note

QC 20250317

Available from: 2024-08-19 Created: 2024-08-19 Last updated: 2025-03-17Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus

Authority records

Iarygina, Oksana

Search in DiVA

By author/editor
Iarygina, Oksana
By organisation
Nordic Institute for Theoretical Physics NORDITA
In the same journal
Journal of Cosmology and Astroparticle Physics
Subatomic Physics

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 11 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf