Starobinsky-Like Inflation and Running Vacuum in the Context of Supergravity
We describe the primeval inflationary phase of the early Universe within a quantum field theoretical (QFT) framework that can be viewed as the effective action of vacuum decay in the early times. Interestingly enough, the model accounts for the “graceful exit” of the inflationary phase into the stan...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2016-07-01
|
| Series: | Universe |
| Subjects: | |
| Online Access: | http://www.mdpi.com/2218-1997/2/3/14 |
| _version_ | 1828371551834079232 |
|---|---|
| author | Spyros Basilakos Nick E. Mavromatos Joan Solà |
| author_facet | Spyros Basilakos Nick E. Mavromatos Joan Solà |
| author_sort | Spyros Basilakos |
| collection | DOAJ |
| description | We describe the primeval inflationary phase of the early Universe within a quantum field theoretical (QFT) framework that can be viewed as the effective action of vacuum decay in the early times. Interestingly enough, the model accounts for the “graceful exit” of the inflationary phase into the standard radiation regime. The underlying QFT framework considered here is supergravity (SUGRA), more specifically an existing formulation in which the Starobinsky-type inflation (de Sitter background) emerges from the quantum corrections to the effective action after integrating out the gravitino fields in their (dynamically induced) massive phase. We also demonstrate that the structure of the effective action in this model is consistent with the generic idea of re-normalization group (RG) running of the cosmological parameters; specifically, it follows from the corresponding RG equation for the vacuum energy density as a function of the Hubble rate, ρ Λ ( H ) . Overall, our combined approach amounts to a concrete-model realization of inflation triggered by vacuum decay in a fundamental physics context, which, as it turns out, can also be extended for the remaining epochs of the cosmological evolution until the current dark energy era. |
| first_indexed | 2024-04-14T06:51:07Z |
| format | Article |
| id | doaj.art-1e677508cea240bbada2d324f010aad2 |
| institution | Directory Open Access Journal |
| issn | 2218-1997 |
| language | English |
| last_indexed | 2024-04-14T06:51:07Z |
| publishDate | 2016-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Universe |
| spelling | doaj.art-1e677508cea240bbada2d324f010aad22022-12-22T02:07:01ZengMDPI AGUniverse2218-19972016-07-01231410.3390/universe2030014universe2030014Starobinsky-Like Inflation and Running Vacuum in the Context of SupergravitySpyros Basilakos0Nick E. Mavromatos1Joan Solà2Academy of Athens, Research Center for Astronomy and Applied Mathematics, Soranou Efessiou 4, 115 27 Athens, GreeceTheoretical Particle Physics and Cosmology Group, Physics Department, King’s College London, Strand, London WC2R 2LS, UKDepartament de Física Quàntica i Astrofísica, and Institute of Cosmos Sciences (ICCUB), Univ. de Barcelona, Av. Diagonal 647 E-08028 Barcelona, Catalonia, SpainWe describe the primeval inflationary phase of the early Universe within a quantum field theoretical (QFT) framework that can be viewed as the effective action of vacuum decay in the early times. Interestingly enough, the model accounts for the “graceful exit” of the inflationary phase into the standard radiation regime. The underlying QFT framework considered here is supergravity (SUGRA), more specifically an existing formulation in which the Starobinsky-type inflation (de Sitter background) emerges from the quantum corrections to the effective action after integrating out the gravitino fields in their (dynamically induced) massive phase. We also demonstrate that the structure of the effective action in this model is consistent with the generic idea of re-normalization group (RG) running of the cosmological parameters; specifically, it follows from the corresponding RG equation for the vacuum energy density as a function of the Hubble rate, ρ Λ ( H ) . Overall, our combined approach amounts to a concrete-model realization of inflation triggered by vacuum decay in a fundamental physics context, which, as it turns out, can also be extended for the remaining epochs of the cosmological evolution until the current dark energy era.http://www.mdpi.com/2218-1997/2/3/14cosmologyinflationvacuum |
| spellingShingle | Spyros Basilakos Nick E. Mavromatos Joan Solà Starobinsky-Like Inflation and Running Vacuum in the Context of Supergravity Universe cosmology inflation vacuum |
| title | Starobinsky-Like Inflation and Running Vacuum in the Context of Supergravity |
| title_full | Starobinsky-Like Inflation and Running Vacuum in the Context of Supergravity |
| title_fullStr | Starobinsky-Like Inflation and Running Vacuum in the Context of Supergravity |
| title_full_unstemmed | Starobinsky-Like Inflation and Running Vacuum in the Context of Supergravity |
| title_short | Starobinsky-Like Inflation and Running Vacuum in the Context of Supergravity |
| title_sort | starobinsky like inflation and running vacuum in the context of supergravity |
| topic | cosmology inflation vacuum |
| url | http://www.mdpi.com/2218-1997/2/3/14 |
| work_keys_str_mv | AT spyrosbasilakos starobinskylikeinflationandrunningvacuuminthecontextofsupergravity AT nickemavromatos starobinskylikeinflationandrunningvacuuminthecontextofsupergravity AT joansola starobinskylikeinflationandrunningvacuuminthecontextofsupergravity |