Status: Bibliographieeintrag
Standort: ---
Exemplare:
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| Online-Ressource |
Verfasst von: | Akrami, Yashar [VerfasserIn]  |
| Hassan, S. F. [VerfasserIn]  |
| Könnig, Frank [VerfasserIn]  |
| Schmidt-May, Angnis [VerfasserIn]  |
| Solomon, Adam [VerfasserIn]  |
Titel: | Bimetric gravity is cosmologically viable |
Verf.angabe: | Yashar Akrami, S.F. Hassan, Frank Könnig, Angnis Schmidt-May, Adam R. Solomon |
E-Jahr: | 2015 |
Jahr: | 29 June 2015 |
Umfang: | 8 S. |
Fussnoten: | Gesehen am 23.09.2020 |
Titel Quelle: | Enthalten in: Physics letters / B |
Ort Quelle: | Amsterdam : North-Holland Publ., 1967 |
Jahr Quelle: | 2015 |
Band/Heft Quelle: | 748(2015), Seite 37-44 |
ISSN Quelle: | 1873-2445 |
Abstract: | Bimetric theory describes gravitational interactions in the presence of an extra spin-2 field. Previous work has suggested that its cosmological solutions are generically plagued by instabilities. We show that by taking the Planck mass for the second metric, Mf, to be small, these instabilities can be pushed back to unobservably early times. In this limit, the theory approaches general relativity with an effective cosmological constant which is, remarkably, determined by the spin-2 interaction scale. This provides a late-time expansion history which is extremely close to ΛCDM, but with a technically-natural value for the cosmological constant. We find Mf should be no larger than the electroweak scale in order for cosmological perturbations to be stable by big-bang nucleosynthesis. We further show that in this limit the helicity-0 mode is no longer strongly-coupled at low energy scales. |
DOI: | doi:10.1016/j.physletb.2015.06.062 |
URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
Volltext ; Verlag: https://doi.org/10.1016/j.physletb.2015.06.062 |
| Volltext: http://www.sciencedirect.com/science/article/pii/S0370269315004840 |
| DOI: https://doi.org/10.1016/j.physletb.2015.06.062 |
Datenträger: | Online-Ressource |
Sprache: | eng |
Sach-SW: | Background cosmology |
| Bigravity |
| Bimetric gravity |
| Cosmic acceleration |
| Dark energy |
| Massive gravity |
| Modified gravity |
K10plus-PPN: | 1733708766 |
Verknüpfungen: | → Zeitschrift |
Bimetric gravity is cosmologically viable / Akrami, Yashar [VerfasserIn]; 29 June 2015 (Online-Ressource)
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