Analysis of inflationary models in higher-dimensional uniform inflation
Abstract We consider higher-dimensional uniform inflation, in which the extra dimensions expand at the same rate as three-dimensional non-compact space during inflation. We compute the cosmological perturbation in D + 4 dimensions and derive the spectral index n s and the tensor-scalar ratio r. We a...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-04-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP04(2025)077 |
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| _version_ | 1850191064853381120 |
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| author | Takuya Hirose |
| author_facet | Takuya Hirose |
| author_sort | Takuya Hirose |
| collection | DOAJ |
| description | Abstract We consider higher-dimensional uniform inflation, in which the extra dimensions expand at the same rate as three-dimensional non-compact space during inflation. We compute the cosmological perturbation in D + 4 dimensions and derive the spectral index n s and the tensor-scalar ratio r. We analyze five inflationary models: chaotic inflation, natural inflation, quartic hilltop inflation, inflation with spontaneously broken SUSY, and R 2 inflation. By combining the results from these models with the Planck 2018 constraints, we discuss that it is not desirable for the extra-dimensional space to expand at the same rate as the three-dimensional non-compact space, except for the case of one extra dimension. |
| format | Article |
| id | doaj-art-c7d7cc1d0ec14670a2bfac27d848bcf7 |
| institution | OA Journals |
| issn | 1029-8479 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-c7d7cc1d0ec14670a2bfac27d848bcf72025-08-20T02:15:00ZengSpringerOpenJournal of High Energy Physics1029-84792025-04-012025412510.1007/JHEP04(2025)077Analysis of inflationary models in higher-dimensional uniform inflationTakuya Hirose0Faculty of Science and Engineering, Kyushu Sangyo UniversityAbstract We consider higher-dimensional uniform inflation, in which the extra dimensions expand at the same rate as three-dimensional non-compact space during inflation. We compute the cosmological perturbation in D + 4 dimensions and derive the spectral index n s and the tensor-scalar ratio r. We analyze five inflationary models: chaotic inflation, natural inflation, quartic hilltop inflation, inflation with spontaneously broken SUSY, and R 2 inflation. By combining the results from these models with the Planck 2018 constraints, we discuss that it is not desirable for the extra-dimensional space to expand at the same rate as the three-dimensional non-compact space, except for the case of one extra dimension.https://doi.org/10.1007/JHEP04(2025)077Early Universe Particle PhysicsExtra DimensionsLarge Extra Dimensions |
| spellingShingle | Takuya Hirose Analysis of inflationary models in higher-dimensional uniform inflation Journal of High Energy Physics Early Universe Particle Physics Extra Dimensions Large Extra Dimensions |
| title | Analysis of inflationary models in higher-dimensional uniform inflation |
| title_full | Analysis of inflationary models in higher-dimensional uniform inflation |
| title_fullStr | Analysis of inflationary models in higher-dimensional uniform inflation |
| title_full_unstemmed | Analysis of inflationary models in higher-dimensional uniform inflation |
| title_short | Analysis of inflationary models in higher-dimensional uniform inflation |
| title_sort | analysis of inflationary models in higher dimensional uniform inflation |
| topic | Early Universe Particle Physics Extra Dimensions Large Extra Dimensions |
| url | https://doi.org/10.1007/JHEP04(2025)077 |
| work_keys_str_mv | AT takuyahirose analysisofinflationarymodelsinhigherdimensionaluniforminflation |