De Sitter vacuum on nucleated D-branes with stringy corrections
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arXiv
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866910900784463872 |
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| author | Nam, Cao H. |
| author_facet | Nam, Cao H. |
| contents | We find four-dimensional de Sitter (dS) vacuum solutions on probe D-branes which nucleate in an asymptotically $\text{AdS}_5\times T^{1,1}$ background, including stringy corrections. A sufficiently high chemical potential induced by the wrapped D3-brane charge, breaking supersymmetry in the bulk, is essential to lead to the nucleation of the probe D-brane. We show that stringy corrections can yield a dS vacuum on a spherical D3-brane consistent with the observations without being fine-tuned. Motivated by the fact that the matter fields propagating in the compact extra dimensions can provide solutions for problems in particle physics and cosmology, we also construct a dS vacuum on a probe D5-brane which wraps on a two-torus of the internal manifold $T^{1,1}$. This construction requires turning on a worldvolume U(1) gauge field along the wrapped part of the D5-brane and dissolving some D3-branes in it. The stringy corrections play an important role in yielding a dS vacuum and the field strength of the U(1) gauge field must be sufficiently large to produce a tiny cosmological constant. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_00600 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | De Sitter vacuum on nucleated D-branes with stringy corrections Nam, Cao H. High Energy Physics - Theory General Relativity and Quantum Cosmology High Energy Physics - Phenomenology We find four-dimensional de Sitter (dS) vacuum solutions on probe D-branes which nucleate in an asymptotically $\text{AdS}_5\times T^{1,1}$ background, including stringy corrections. A sufficiently high chemical potential induced by the wrapped D3-brane charge, breaking supersymmetry in the bulk, is essential to lead to the nucleation of the probe D-brane. We show that stringy corrections can yield a dS vacuum on a spherical D3-brane consistent with the observations without being fine-tuned. Motivated by the fact that the matter fields propagating in the compact extra dimensions can provide solutions for problems in particle physics and cosmology, we also construct a dS vacuum on a probe D5-brane which wraps on a two-torus of the internal manifold $T^{1,1}$. This construction requires turning on a worldvolume U(1) gauge field along the wrapped part of the D5-brane and dissolving some D3-branes in it. The stringy corrections play an important role in yielding a dS vacuum and the field strength of the U(1) gauge field must be sufficiently large to produce a tiny cosmological constant. |
| title | De Sitter vacuum on nucleated D-branes with stringy corrections |
| topic | High Energy Physics - Theory General Relativity and Quantum Cosmology High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2504.00600 |