Scale Invariance, Inflation and the Present Vacuum Energy of the Universe
| dc.creator | Guendelman, E. I. | |
| dc.date | 2000-04-04 | |
| dc.date.accessioned | 2026-07-07T03:24:51Z | |
| dc.date.available | 2026-07-07T03:24:51Z | |
| dc.description | The possibility of mass in the context of scale-invariant, generally covariant theories, is discussed. Scale invariance is considered in the context of a gravitational theory where the action, in the first order formalism, is of the form $S = \int L_{1} Φd^4x$ + $\int L_{2}\sqrt{-g}d^4x$ where $Φ$ is a density built out of degrees of freedom independent of the metric. For global scale invariance, a "dilaton" $ϕ$ has to be introduced, with non-trivial potentials $V(ϕ)$ = $f_{1}e^{αϕ}$ in $L_1$ and $U(ϕ)$ = $f_{2}e^{2αϕ}$ in $L_2$. This leads to non-trivial mass generation and a potential for $ϕ$ which is interesting for inflation. The model after ssb can be connected to the induced gravity model of Zee, which is a successful model of inflation. Models of the present universe and a natural transition from inflation to a slowly accelerated universe at late times are discussed. | |
| dc.description | Contribution to the conference "Energy Densities in the Universe", Les Arcs, France, January 2000 | |
| dc.identifier | https://arxiv.org/abs/gr-qc/0004011 | |
| dc.identifier | http://arxiv.org/abs/gr-qc/0004011 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/33497 | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.title | Scale Invariance, Inflation and the Present Vacuum Energy of the Universe | |
| dc.type | text |