G-inflation: from the intermediate, logamediate and exponential models
Abstract The intermediate, logamediate and exponential inflationary models in the context of Galileon inflation or G-inflation are studied. By assuming a coupling of the form $$G(\phi ,X)\propto \phi ^{\nu }\,X^{n}$$ G(ϕ,X)∝ϕνXn in the action, we obtain different analytical solutions from the backgr...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2018-11-01
|
| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | http://link.springer.com/article/10.1140/epjc/s10052-018-6420-x |
| Summary: | Abstract The intermediate, logamediate and exponential inflationary models in the context of Galileon inflation or G-inflation are studied. By assuming a coupling of the form $$G(\phi ,X)\propto \phi ^{\nu }\,X^{n}$$ G(ϕ,X)∝ϕνXn in the action, we obtain different analytical solutions from the background cosmological perturbations assuming the slow-roll approximation. General conditions required for these models of G-inflation to be realizable are determined and discussed. In general, we analyze the condition of inflation and also we use recent astronomical and cosmological observations for constraining the parameters appearing in these G-inflationary models. |
|---|---|
| ISSN: | 1434-6044 1434-6052 |