Initial directional singularity in inflationary models

Fernández Jambrina, Leonardo (2016). Initial directional singularity in inflationary models. "Physical Review D", v. 94 (n. 2); pp.. ISSN 1550-7998. https://doi.org/10.1103/PhysRevD.94.024049.

Description

Title: Initial directional singularity in inflationary models
Author/s:
  • Fernández Jambrina, Leonardo
Item Type: Article
Título de Revista/Publicación: Physical Review D
Date: 2016
ISSN: 1550-7998
Volume: 94
Subjects:
Faculty: E.T.S.I. Navales (UPM)
Department: Matemática e Informática Aplicadas a la Ingenierías Civil y Naval
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

In Haro, Amoro?s, and Pan [Phys. Rev. D 93, 084018 (2016)] a new cosmological model is proposed with no big bang singularity in the past, though past geodesically incomplete. This model starts with an inflationary era, follows with a stiff matter dominated period and evolves to accelerated expansion in an asymptotically de Sitter regime in a realistic fashion. The big bang singularity is replaced by a directional singularity. This singularity cannot be reached by comoving observers, since it would take them an infinite proper time lapse to go back to it. On the contrary, observers with nonzero linear momentum have the singularity at finite proper time in their past, though arbitrarily large. Hence, the time lapse from the initial singularity can be as long as desired, even infinity, depending on the linear momentum of the observer. This conclusion applies to similar inflationary models. Due to the interest of these models, we address here the properties of such singularities.

More information

Item ID: 48745
DC Identifier: http://oa.upm.es/48745/
OAI Identifier: oai:oa.upm.es:48745
DOI: 10.1103/PhysRevD.94.024049
Official URL: https://journals.aps.org/prd/abstract/10.1103/PhysRevD.94.024049
Deposited by: Memoria Investigacion
Deposited on: 13 Dec 2018 11:09
Last Modified: 13 Dec 2018 12:27
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