Abstract
We reconsider a toy model of topological inflation, based on the R 4-modified gravity. By using its equivalence to a certain scalar-tensor gravity model in four spacetime dimensions, we compute the inflaton scalar potential and investigate the possibility of inflation. We confirm the existence of slow-roll inflation with an exit. However, the model suffers from the η-problem that gives rise to the unacceptable value of the spectral index ns of scalar perturbations.
| Original language | English |
|---|---|
| Article number | 145016 |
| Journal | Classical and Quantum Gravity |
| Volume | 27 |
| Issue number | 14 |
| DOIs | |
| Publication status | Published - 2010 |
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ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
Cite this
Slow-roll inflation in the (R + R4) gravity. / Kaneda, Sho; Ketov, Sergei V.; Watanabe, Natsuki.
In: Classical and Quantum Gravity, Vol. 27, No. 14, 145016, 2010.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Slow-roll inflation in the (R + R4) gravity
AU - Kaneda, Sho
AU - Ketov, Sergei V.
AU - Watanabe, Natsuki
PY - 2010
Y1 - 2010
N2 - We reconsider a toy model of topological inflation, based on the R 4-modified gravity. By using its equivalence to a certain scalar-tensor gravity model in four spacetime dimensions, we compute the inflaton scalar potential and investigate the possibility of inflation. We confirm the existence of slow-roll inflation with an exit. However, the model suffers from the η-problem that gives rise to the unacceptable value of the spectral index ns of scalar perturbations.
AB - We reconsider a toy model of topological inflation, based on the R 4-modified gravity. By using its equivalence to a certain scalar-tensor gravity model in four spacetime dimensions, we compute the inflaton scalar potential and investigate the possibility of inflation. We confirm the existence of slow-roll inflation with an exit. However, the model suffers from the η-problem that gives rise to the unacceptable value of the spectral index ns of scalar perturbations.
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UR - http://www.scopus.com/inward/citedby.url?scp=77953494284&partnerID=8YFLogxK
U2 - 10.1088/0264-9381/27/14/145016
DO - 10.1088/0264-9381/27/14/145016
M3 - Article
AN - SCOPUS:77953494284
VL - 27
JO - Classical and Quantum Gravity
JF - Classical and Quantum Gravity
SN - 0264-9381
IS - 14
M1 - 145016
ER -