dc.contributor.author |
Avdeev N. |
|
dc.contributor.author |
Toporensky A. |
|
dc.date.accessioned |
2022-02-09T20:33:16Z |
|
dc.date.available |
2022-02-09T20:33:16Z |
|
dc.date.issued |
2021 |
|
dc.identifier.issn |
0202-2893 |
|
dc.identifier.uri |
https://dspace.kpfu.ru/xmlui/handle/net/168967 |
|
dc.description.abstract |
Abstract: We consider the initial conditions for inflation in the nonminimal kinetic coupling theory. If inflation is driven solely by the kinetic term with no potential, the resulting number of e-folds depends only on the initial velocity of the scalar field, φ. We write down the expression for the number of e-folds explicitly, and show that for physically reasonable values of the coupling constant, we can get 60 e-folds only for an exponentially big initial φ. When the scalar field potential is taken into account, a double inflation scenario arises, where the first inflation is kinetic term driven, while the second one is potential term driven. In this case, we need not a very large φ to start with for 60 e-folds, on the other hand, some initial conditions lead to a physically inadmissible eternal inflation. We show numerically that in the measure used in the present paper only a smaller part of initial conditions leads to eternal inflation for reasonable values of the coupling constant. |
|
dc.relation.ispartofseries |
Gravitation and Cosmology |
|
dc.title |
On Viability of Inflation in Nonminimal Kinetic Coupling Theory |
|
dc.type |
Article |
|
dc.relation.ispartofseries-issue |
3 |
|
dc.relation.ispartofseries-volume |
27 |
|
dc.collection |
Публикации сотрудников КФУ |
|
dc.relation.startpage |
269 |
|
dc.source.id |
SCOPUS02022893-2021-27-3-SID85114997866 |
|