S-dual Quintessence, the Swampland, and the DESI DR2 Results
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2025
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| author | Anchordoqui, Luis A. Antoniadis, Ignatios Lust, Dieter |
| author_facet | Anchordoqui, Luis A. Antoniadis, Ignatios Lust, Dieter |
| contents | We propose a dark energy model in which a quintessence field $ϕ$ rolls near the vicinity of a local maximum of its potential characterized by the simplest $S$ self-dual form $V(ϕ) = Λ\ {\rm sech}(\sqrt{2} \, ϕ/M_p)$, where $M_p$ is the reduced Planck mass and $Λ\sim 10^{-120} M_p^4$ is the cosmological constant. We confront the model with Swampland ideas and show that the $S$-dual potential is consistent with the distance conjecture, the de Sitter conjecture, and the trans-Planckian censorship conjecture. We also examine the compatibility of this phenomenological model with the intriguing DESI DR2 results and show that the shape of the $S$-dual potential is almost indistinguishable from the axion-like potential, $V (ϕ) = m_a^2 \ f_a^2 \ [ 1 + \cos(ϕ/f_a)]$, with $m_a$ and $f_a$ parameters fitted by the DESI Collaboration to accommodate the DR2 data. The self-dual potential has the advantage that one starts at the self-dual point and this is a theoretical motivation, because as the universe cools off the $\mathbb{Z}_2$ symmetry gets broken leading to a natural rolling away from the symmetric point. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2503_19428 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | S-dual Quintessence, the Swampland, and the DESI DR2 Results Anchordoqui, Luis A. Antoniadis, Ignatios Lust, Dieter High Energy Physics - Theory Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology We propose a dark energy model in which a quintessence field $ϕ$ rolls near the vicinity of a local maximum of its potential characterized by the simplest $S$ self-dual form $V(ϕ) = Λ\ {\rm sech}(\sqrt{2} \, ϕ/M_p)$, where $M_p$ is the reduced Planck mass and $Λ\sim 10^{-120} M_p^4$ is the cosmological constant. We confront the model with Swampland ideas and show that the $S$-dual potential is consistent with the distance conjecture, the de Sitter conjecture, and the trans-Planckian censorship conjecture. We also examine the compatibility of this phenomenological model with the intriguing DESI DR2 results and show that the shape of the $S$-dual potential is almost indistinguishable from the axion-like potential, $V (ϕ) = m_a^2 \ f_a^2 \ [ 1 + \cos(ϕ/f_a)]$, with $m_a$ and $f_a$ parameters fitted by the DESI Collaboration to accommodate the DR2 data. The self-dual potential has the advantage that one starts at the self-dual point and this is a theoretical motivation, because as the universe cools off the $\mathbb{Z}_2$ symmetry gets broken leading to a natural rolling away from the symmetric point. |
| title | S-dual Quintessence, the Swampland, and the DESI DR2 Results |
| topic | High Energy Physics - Theory Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2503.19428 |