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Palatini approach to R 2 gravity |
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| รหัสดีโอไอ | |
| Creator | Tritos Ngampitipan |
| Title | Palatini approach to R 2 gravity |
| Publisher | Maejo University |
| Publication Year | 2565 |
| Journal Title | Maejo International Journal of Science and Technology |
| Journal Vol. | 16 |
| Journal No. | 1 |
| Page no. | 66 |
| Keyword | current cosmic acceleration, Einstein-Hilbert action, f(R) gravity, Palatini approach, R-2 gravity |
| Website title | Maejo International Journal of Science and Technology |
| ISSN | 1905-7873 |
| Abstract | An f(R) gravity, where the Ricci scalar (R) term in the Einstein-Hilbert action of general relativity is generalised to its function f(R), is an alternative to a dark energy model to explain the current cosmic acceleration. In this paper the R-2 gravity, in which a term proportional to R-2 is added to the R term in the Einstein-Hilbert action, is explored in the Palatini approach. The results show that when the proportionality constant is negative, the R-2 gravity can give the de-Sitter universe, where the universe has the exponentially accelerating expansion, after the matter-dominated era without introducing dark energy |
