Evading Lyth bound in models of quintessential inflation

Evading Lyth bound in models of quintessential inflation

Quintessential inflation refers to an attempt to unify inflation and late-time cosmic acceleration using a single scalar field. In this letter we consider two different classes of quintessential inflation, one of which is based upon a Lagrangian with non-canonical kinetic term k2(ϕ)∂μϕ∂μϕ and a stee...

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Main Authors: Md. Wali Hossain, R. Myrzakulov, M. Sami, Emmanuel N. Saridakis
Format: Article
Language:English
Published: Elsevier 2014-10-01
Series:Physics Letters B
Online Access:http://www.sciencedirect.com/science/article/pii/S037026931400625X
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spelling doaj-f218a5a002c94e1a8be98ec98fe55ada2020-11-24T21:35:01ZengElsevierPhysics Letters B0370-26931873-24452014-10-01737C19119510.1016/j.physletb.2014.08.051Evading Lyth bound in models of quintessential inflationMd. Wali Hossain0R. Myrzakulov1M. Sami2Emmanuel N. Saridakis3Centre for Theoretical Physics, Jamia Millia Islamia, New Delhi 110025, IndiaEurasian International Center for Theoretical Physics, Eurasian National University, Astana 010008, KazakhstanCentre for Theoretical Physics, Jamia Millia Islamia, New Delhi 110025, IndiaPhysics Division, National Technical University of Athens, 15780 Zografou Campus, Athens, GreeceQuintessential inflation refers to an attempt to unify inflation and late-time cosmic acceleration using a single scalar field. In this letter we consider two different classes of quintessential inflation, one of which is based upon a Lagrangian with non-canonical kinetic term k2(ϕ)∂μϕ∂μϕ and a steep exponential potential while the second class uses the concept of steep brane world inflation. We show that in both cases the Lyth bound can be evaded, despite the large tensor-to-scalar ratio of perturbations. The post-inflationary dynamics is consistent with nucleosynthesis constraint in these cases.http://www.sciencedirect.com/science/article/pii/S037026931400625X
collection DOAJ
language English
format Article
sources DOAJ
author Md. Wali Hossain
R. Myrzakulov
M. Sami
Emmanuel N. Saridakis
spellingShingle Md. Wali Hossain
R. Myrzakulov
M. Sami
Emmanuel N. Saridakis
Evading Lyth bound in models of quintessential inflation
Physics Letters B
author_facet Md. Wali Hossain
R. Myrzakulov
M. Sami
Emmanuel N. Saridakis
author_sort Md. Wali Hossain
title Evading Lyth bound in models of quintessential inflation
title_short Evading Lyth bound in models of quintessential inflation
title_full Evading Lyth bound in models of quintessential inflation
title_fullStr Evading Lyth bound in models of quintessential inflation
title_full_unstemmed Evading Lyth bound in models of quintessential inflation
title_sort evading lyth bound in models of quintessential inflation
publisher Elsevier
series Physics Letters B
issn 0370-2693
1873-2445
publishDate 2014-10-01
description Quintessential inflation refers to an attempt to unify inflation and late-time cosmic acceleration using a single scalar field. In this letter we consider two different classes of quintessential inflation, one of which is based upon a Lagrangian with non-canonical kinetic term k2(ϕ)∂μϕ∂μϕ and a steep exponential potential while the second class uses the concept of steep brane world inflation. We show that in both cases the Lyth bound can be evaded, despite the large tensor-to-scalar ratio of perturbations. The post-inflationary dynamics is consistent with nucleosynthesis constraint in these cases.
url http://www.sciencedirect.com/science/article/pii/S037026931400625X
work_keys_str_mv AT mdwalihossain evadinglythboundinmodelsofquintessentialinflation
AT rmyrzakulov evadinglythboundinmodelsofquintessentialinflation
AT msami evadinglythboundinmodelsofquintessentialinflation
AT emmanuelnsaridakis evadinglythboundinmodelsofquintessentialinflation
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