N-flation in supergravity

N-flation in supergravity

We have constructed a large field N-flation model in the supergravity framework. In this simple set-up, N fields collectively drive inflation where each field traverses sub-Planckian field values. This has been realised with a generalisation of the single-field chaotic inflation in supergravity. Int...

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Main Authors: Kumar Das, Koushik Dutta
Format: Article
Language:English
Published: Elsevier 2014-11-01
Series:Physics Letters B
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269314007370
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spelling doaj-74d0e349a8b24eb9ade1ceac928a5b902020-11-24T21:32:02ZengElsevierPhysics Letters B0370-26932014-11-01738457463N-flation in supergravityKumar Das0Koushik Dutta1Corresponding author.; Theory Division, Saha Institute of Nuclear Physics, 1/AF Bidhan Nagar, Kolkata 700064, IndiaTheory Division, Saha Institute of Nuclear Physics, 1/AF Bidhan Nagar, Kolkata 700064, IndiaWe have constructed a large field N-flation model in the supergravity framework. In this simple set-up, N fields collectively drive inflation where each field traverses sub-Planckian field values. This has been realised with a generalisation of the single-field chaotic inflation in supergravity. Interestingly, despite the presence of the field interactions, the dynamics can be described in terms of an effective single field. The observable predictions of our model, i.e., tensor-to-scalar ratio r and scalar spectral index ns, are akin to the chaotic inflation.http://www.sciencedirect.com/science/article/pii/S0370269314007370
collection DOAJ
language English
format Article
sources DOAJ
author Kumar Das
Koushik Dutta
spellingShingle Kumar Das
Koushik Dutta
N-flation in supergravity
Physics Letters B
author_facet Kumar Das
Koushik Dutta
author_sort Kumar Das
title N-flation in supergravity
title_short N-flation in supergravity
title_full N-flation in supergravity
title_fullStr N-flation in supergravity
title_full_unstemmed N-flation in supergravity
title_sort n-flation in supergravity
publisher Elsevier
series Physics Letters B
issn 0370-2693
publishDate 2014-11-01
description We have constructed a large field N-flation model in the supergravity framework. In this simple set-up, N fields collectively drive inflation where each field traverses sub-Planckian field values. This has been realised with a generalisation of the single-field chaotic inflation in supergravity. Interestingly, despite the presence of the field interactions, the dynamics can be described in terms of an effective single field. The observable predictions of our model, i.e., tensor-to-scalar ratio r and scalar spectral index ns, are akin to the chaotic inflation.
url http://www.sciencedirect.com/science/article/pii/S0370269314007370
work_keys_str_mv AT kumardas nflationinsupergravity
AT koushikdutta nflationinsupergravity
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