Boehmer, CG;
Tamanini, N;
Wright, M;
(2015)
Einstein static universe in scalar-fluid theories.
Physical Review D
, 92
, Article 124067. 10.1103/PhysRevD.92.124067.
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Abstract
A new Lagrangian framework has recently been proposed to describe interactions between relativistic perfect fluids and scalar fields. In this paper we investigate the Einstein static universe in this new class of theories, which have been named scalar-fluid theories. The stability of the static solutions to both homogeneous and inhomogeneous perturbations is analyzed deriving the relevant cosmological perturbation equations at the linear order. We can find several configurations corresponding to an Einstein static universes which are stable against inhomogeneous perturbations, but unstable against homogeneous perturbations. This shows the possible applications of scalar-fluid theories to the inflationary emergent universe scenario.
| Type: | Article |
|---|---|
| Title: | Einstein static universe in scalar-fluid theories |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevD.92.124067 |
| Publisher version: | https://doi.org/10.1103/PhysRevD.92.124067 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Astronomy & Astrophysics, Physics, Particles & Fields, Physics, EMERGENT UNIVERSE, STABILITY, LOOP |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Mathematics |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10130924 |
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