Relic gravitons from stiff curvature perturbations
The tensor modes reentering the Hubble radius when the plasma is dominated by a stiff fluid lead to a spectral energy density whose blue slope depends on the total post-inflationary sound speed. This result gets however corrected by a secondary (gauge-dependent) term coming from the curvature inhomo...
| Auteur principal: | |
|---|---|
| Format: | Article |
| Langue: | English |
| Publié: |
Elsevier
2020-11-01
|
| Collection: | Physics Letters B |
| Accès en ligne: | http://www.sciencedirect.com/science/article/pii/S0370269320306043 |