Cargando…
Model-independent approach to effective sound speed in multi-field inflation
For any physical system satisfying the Einstein’s equations, the comoving curvature perturbations satisfy an equation involving the momentum-dependent effective sound speed, valid for any system with a well defined energy-stress tensor, including multi-fields models of inflation. We derive a general...
| Autores principales: | , , |
|---|---|
| Lenguaje: | eng |
| Publicado: |
2022
|
| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1140/epjc/s10052-022-10669-3 http://cds.cern.ch/record/2826913 |