INVESTIGADORES
BELLINI Mauricio
artículos
Título:
A confirmation of agreement of different approaches for scalar gauge-invariant metric perturbations during inflation
Autor/es:
MARIANO ANABITARTE; MAURICIO BELLINI
Revista:
EUROPEAN PHYSICAL JOURNAL C - PARTICLES AND FIELDS
Editorial:
Springer Berlin / Heidelberg
Referencias:
Lugar: Berlin; Año: 2009 vol. 60 p. 297 - 297
ISSN:
1434-6044
Resumen:
We revisit an extension of the well-known formalism for gauge-invariant scalar metric fluctuations to study the spectra for both the inflaton and gauge-invariant (scalar) metric fluctuations in the framework of a single-field inflationary model, in which the quasi-exponential expansion is driven by an inflaton which is minimally coupled to gravity. The proposal here examined is valid also for fluctuations with large amplitudes, but for cosmological scales, where vector and tensor perturbations can be neglected and the fluid is irrotacional.
rds']