Inflation in $R + R^2$ Gravity with Torsion
| dc.creator | Wang, Chih-Hung | |
| dc.creator | Wu, Yu-Huei | |
| dc.date | 2008-07-01 | |
| dc.date | 2009-02-06 | |
| dc.date.accessioned | 2026-07-07T12:40:13Z | |
| dc.date.available | 2026-07-07T12:40:13Z | |
| dc.description | We examine an inflationary model in $R + R^2$ gravity with torsion, where $R^2$ denotes five independent quadratic curvature invariants; it turns out that only two free parameters remain in this model. We show that the behavior of the scale factor $a(t)$ is determined by two scalar fields, axial torsion $χ(t)$ and the totally anti-symmetric curvature $E(t)$, which satisfy two first-order differential equations. Considering $\dotχ\approx 0$ during inflation leads to a power-law inflation: $a \sim (t+ A)^p$ where $1< p \leq 2 $, and the constant $A$ is determined by the initial values of $E$, $χ$ and the two parameters. After the end of inflation, $χ$ and $E$ will enter into an oscillatory phase. | |
| dc.description | 9 pages, LaTex; v2: separated into five sections, added more content in Introduction and Conclusion, abstract and section 2 improved; v3: three typos are corrected | |
| dc.identifier | https://arxiv.org/abs/0807.0069 | |
| dc.identifier | http://arxiv.org/abs/0807.0069 | |
| dc.identifier | Class.Quant.Grav.26:045016,2009 | |
| dc.identifier | doi:10.1088/0264-9381/26/4/045016 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/219375 | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.title | Inflation in $R + R^2$ Gravity with Torsion | |
| dc.type | text |