Gauge invariant fluctuations of the metric during inflation from a new scalar-tensor Weyl-integrable gravity model
| Autor: | Mauricio Bellini, Carlos Romero, M. L. Pucheu, José Edgar Madriz Aguilar |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Integrable system
Ciencias Físicas FOS: Physical sciences General Relativity and Quantum Cosmology (gr-qc) Física de Partículas y Campos 01 natural sciences General Relativity and Quantum Cosmology Cosmology purl.org/becyt/ford/1 [https] Gravitation INFLATION GAUGE-INVARIANCE 0103 physical sciences Gauge theory 010303 astronomy & astrophysics Mathematical physics Physics 010308 nuclear & particles physics purl.org/becyt/ford/1.3 [https] Inflaton Invariant (physics) COSMOLOGY f(R) gravity Scalar field CIENCIAS NATURALES Y EXACTAS |
| Zdroj: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| ISSN: | 2470-0029 2470-0010 |
| DOI: | 10.1103/physrevd.94.064075 |
| Popis: | We investigate gauge invariant scalar fluctuations of the metric during inflation in a non-perturbative formalism in the framework of a recently introduced scalar-tensor theory of gravity formulated on a Weyl-Integrable geometry. We found that the Weyl scalar field can play the role of the inflaton field in this theory. As an application we study the case of a power law inflation. In this case the quasi-scale invariance of the spectrum for scalar fluctuations of the metric is achieved for determined values of the $\omega$ parameter of the scalar-tensor theory. In our formalism the physical inflaton field has a geometrical origin. Comment: 9 pages, no figures. This is a revised version accepted for publication in Physical Review D |
| Databáze: | OpenAIRE |
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