Abstract
We consider cosmological scalar field evolving under exponential potential of the Non-minimal Derivative Coupling (NMDC) gravity model in Palatini formalism. Slow-roll regime is assumed. GR and metric formalism NMDC cases are compared in this study. Phase portraits show that Palatini NMDC effect restricts acceleration phase into smaller region in the phase space. NMDC effect of the Palatini case suppresses expansion rate than that of the GR while the metric NMDC enhances rate of expansion of the GR case.
| Original language | English |
|---|---|
| Article number | 012128 |
| Journal | Journal of Physics: Conference Series |
| Volume | 1144 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 19 Dec 2018 |
| Externally published | Yes |
| Event | Siam Physics Congress 2018: A Creative Path to Sustainable Innovation, SPC 2018 - Pitsanulok, Thailand Duration: 21 May 2018 → 23 May 2018 |
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