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Primordial perturbations and non-Gaussianities in DBI and general multi-field inflation
We study cosmological perturbations in general inflation models with multiple scalar fields and arbitrary kinetic terms, with special emphasis on the multi-field extension of Dirac-Born-Infeld (DBI) inflation. We compute the second-order action governing the dynamics of linear perturbations in the m...
| Autores principales: | , , , |
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| Lenguaje: | eng |
| Publicado: |
2008
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1103/PhysRevD.78.063523 http://cds.cern.ch/record/1107526 |