Reconciling early dark energy with a Harrison-Zeldovich spectrum
Fuente:
arXiv
Salvato in:
| Autori principali: | , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2023
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866913245117284352 |
|---|---|
| author | Fu, Chengjie Wang, Shao-Jiang |
| author_facet | Fu, Chengjie Wang, Shao-Jiang |
| contents | Recent attempts to fully resolve the Hubble tension from early dark energy models seem to favor a primordial Harrison-Zeldovich universe with its scalar spectrum being extremely scale invariant. Restoring the Harrison-Zeldovich spectrum within the single-field inflationary paradigm appears to be infeasible, turning to the multifield approach from either curvaton or waterfall models. In this Letter, we successfully align with the Harrison-Zeldovich spectrum within a single-field chaotic inflation by a nonminimal derivative coupling, and the previously disfavored chaotic potential by Planck+BICEP/Keck data in the standard $Λ$-cold-dark-matter model now returns back to the scope of future polarization observations of the cosmic microwave background. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_12932 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Reconciling early dark energy with a Harrison-Zeldovich spectrum Fu, Chengjie Wang, Shao-Jiang Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology Recent attempts to fully resolve the Hubble tension from early dark energy models seem to favor a primordial Harrison-Zeldovich universe with its scalar spectrum being extremely scale invariant. Restoring the Harrison-Zeldovich spectrum within the single-field inflationary paradigm appears to be infeasible, turning to the multifield approach from either curvaton or waterfall models. In this Letter, we successfully align with the Harrison-Zeldovich spectrum within a single-field chaotic inflation by a nonminimal derivative coupling, and the previously disfavored chaotic potential by Planck+BICEP/Keck data in the standard $Λ$-cold-dark-matter model now returns back to the scope of future polarization observations of the cosmic microwave background. |
| title | Reconciling early dark energy with a Harrison-Zeldovich spectrum |
| topic | Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2310.12932 |