On the Validity of the Effective Theory of (Multi-)Field Inflation
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2026
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866911726017970176 |
|---|---|
| author | de Magistris, Andrea Ambrosi Salvio, Alberto |
| author_facet | de Magistris, Andrea Ambrosi Salvio, Alberto |
| contents | Motivated by trans-Planckian issues in inflation, we determine the Hilbert space and amplitudes of quantum perturbations in the general low-energy effective theory of (multi-)field inflation without relying on the sub-horizon limit. The scalar sector is the most intricate, featuring field mixings and second-class constraints, which we handle using Dirac brackets. These results enable us to estimate the magnitude of higher-derivative corrections. In the specific case of slow-roll inflation, such estimate can be expressed in terms of the first slow-roll parameter $ε$ for a given cutoff $Λ$. We apply our results to several inflationary models with finite $Λ$: Higgs inflation, the Starobinsky model, natural inflation and hilltop inflation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_27505 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | On the Validity of the Effective Theory of (Multi-)Field Inflation de Magistris, Andrea Ambrosi Salvio, Alberto High Energy Physics - Theory Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology Motivated by trans-Planckian issues in inflation, we determine the Hilbert space and amplitudes of quantum perturbations in the general low-energy effective theory of (multi-)field inflation without relying on the sub-horizon limit. The scalar sector is the most intricate, featuring field mixings and second-class constraints, which we handle using Dirac brackets. These results enable us to estimate the magnitude of higher-derivative corrections. In the specific case of slow-roll inflation, such estimate can be expressed in terms of the first slow-roll parameter $ε$ for a given cutoff $Λ$. We apply our results to several inflationary models with finite $Λ$: Higgs inflation, the Starobinsky model, natural inflation and hilltop inflation. |
| title | On the Validity of the Effective Theory of (Multi-)Field Inflation |
| topic | High Energy Physics - Theory Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2605.27505 |