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Chimento, L.P.; Lazkoz, R.; Richarte, M.G. "Enhanced inflation in the Dirac-Born-Infeld framework" (2011) Physical Review D - Particles, Fields, Gravitation and Cosmology. 83(6)
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Abstract:

We consider the Einstein equations within the Dirac-Born-Infield (DBI) scenario for a spatially flat Friedmann-Robertson-Walker (FRW) spacetime without a cosmological constant. We derive the inflationary scenario by applying the symmetry transformations which preserve the form of the Friedmann and conservation equations. These form invariance transformations generate a symmetry group parametrized by the Lorentz factor γ. We explicitly obtain an inflationary scenario by the cooperative effect of adding energy density into the Friedmann equation. For the case of a constant Lorentz factor, and under the slow roll assumption, we find the transformation rules for the scalar and tensor power spectra of perturbations as well as their ratio under the action of the form invariance symmetry group. Within this case and due to its relevance for the inflationary paradigm, we find the general solution of the dynamical equations for a DBI field driven by an exponential potential and show a broad set of inflationary solutions. The general solution can be split into three subsets and all these behave asymptotically as a power-law solution at early and at late times. © 2011 American Physical Society.

Registro:

Documento: Artículo
Título:Enhanced inflation in the Dirac-Born-Infeld framework
Autor:Chimento, L.P.; Lazkoz, R.; Richarte, M.G.
Filiación:Departamento de Física, Facultad de Ciencias Exactas y Naturales, Pabellón i, 1428 Buenos Aires, Argentina
Fisika Teorikoa, Zientzia Eta Teknologia Fakultatea, Euskal Herriko Unibertsitatea, 644 Posta Kutxatila, 48080 Bilbao, Spain
Año:2011
Volumen:83
Número:6
DOI: http://dx.doi.org/10.1103/PhysRevD.83.063505
Título revista:Physical Review D - Particles, Fields, Gravitation and Cosmology
Título revista abreviado:Phys Rev D Part Fields Gravit Cosmol
ISSN:15507998
CODEN:PRVDA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v83_n6_p_Chimento

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Citas:

---------- APA ----------
Chimento, L.P., Lazkoz, R. & Richarte, M.G. (2011) . Enhanced inflation in the Dirac-Born-Infeld framework. Physical Review D - Particles, Fields, Gravitation and Cosmology, 83(6).
http://dx.doi.org/10.1103/PhysRevD.83.063505
---------- CHICAGO ----------
Chimento, L.P., Lazkoz, R., Richarte, M.G. "Enhanced inflation in the Dirac-Born-Infeld framework" . Physical Review D - Particles, Fields, Gravitation and Cosmology 83, no. 6 (2011).
http://dx.doi.org/10.1103/PhysRevD.83.063505
---------- MLA ----------
Chimento, L.P., Lazkoz, R., Richarte, M.G. "Enhanced inflation in the Dirac-Born-Infeld framework" . Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 83, no. 6, 2011.
http://dx.doi.org/10.1103/PhysRevD.83.063505
---------- VANCOUVER ----------
Chimento, L.P., Lazkoz, R., Richarte, M.G. Enhanced inflation in the Dirac-Born-Infeld framework. Phys Rev D Part Fields Gravit Cosmol. 2011;83(6).
http://dx.doi.org/10.1103/PhysRevD.83.063505