https://doi.org/10.1140/epjc/s10052-017-5256-0
Regular Article - Theoretical Physics
Inflationary scenario from higher curvature warped spacetime
1
Department of Physical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur Campus, Nadia, West Bengal, 741246, India
2
Department of Theoretical Physics, Indian Association for the Cultivation of Science, 2A & 2B Raja S.C. Mullick Road, Kolkata, 700 032, India
* e-mail: pul.tnmy9@gmail.com
Received:
23
August
2017
Accepted:
24
September
2017
Published online:
11
October
2017
We consider a five dimensional warped spacetime, in presence of the higher curvature term like 
in the bulk, in the context of the two-brane model. Our universe is identified with the TeV scale brane and emerges as a four dimensional effective theory. From the perspective of this effective theory, we examine the possibility of “inflationary scenario” by considering the on-brane metric ansatz as an FRW one. Our results reveal that the higher curvature term in the five dimensional bulk spacetime generates a potential term for the radion field. Due to the presence of radion potential, the very early universe undergoes a stage of accelerated expansion and, moreover, the accelerating period of the universe terminates in a finite time. We also find the spectral index of curvature perturbation (
) and the tensor to scalar ratio (r) in the present context, which match with the observational results based on the observations of Planck (Astron. Astrophys. 594, A20, 2016).
© The Author(s), 2017
