Quasi-pole quintessential inflation in metric-affine gravity
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866914399668666368 |
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| author | Dimopoulos, Konstantinos Dioguardi, Christian Gialamas, Ioannis D. Racioppi, Antonio |
| author_facet | Dimopoulos, Konstantinos Dioguardi, Christian Gialamas, Ioannis D. Racioppi, Antonio |
| contents | We study quintessential inflation in the framework of metric-affine gravity. It is well known that non-minimal couplings with the Holst invariant can generate a quasi-pole inflationary behaviour resulting in a Starobinsky-like phenomenology. The same quasi-pole behaviour can also be used in order to "flatten" the scalar potential in the Dark Energy era providing a successful framework for quintessential inflation. Agreement with all the observational constraints, reduces the predicted scalar spectral index to a narrow window: $0.966 \lesssim n_s \lesssim 0.967$, making the model highly testable and falsifiable. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2603_15776 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Quasi-pole quintessential inflation in metric-affine gravity Dimopoulos, Konstantinos Dioguardi, Christian Gialamas, Ioannis D. Racioppi, Antonio General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology We study quintessential inflation in the framework of metric-affine gravity. It is well known that non-minimal couplings with the Holst invariant can generate a quasi-pole inflationary behaviour resulting in a Starobinsky-like phenomenology. The same quasi-pole behaviour can also be used in order to "flatten" the scalar potential in the Dark Energy era providing a successful framework for quintessential inflation. Agreement with all the observational constraints, reduces the predicted scalar spectral index to a narrow window: $0.966 \lesssim n_s \lesssim 0.967$, making the model highly testable and falsifiable. |
| title | Quasi-pole quintessential inflation in metric-affine gravity |
| topic | General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2603.15776 |