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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2507.17802 |
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| _version_ | 1866917409770700800 |
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| author | Aparici, Miquel Basile, Ivano Risso, Nicolò |
| author_facet | Aparici, Miquel Basile, Ivano Risso, Nicolò |
| contents | Parametric scale separation is notoriously difficult to achieve in flux compactifications of gravitational effective theories. An appealing alternative to conventional Freund-Rubin vacua involves Ricci-flat internal manifolds, where the energy supplied by fluxes is balanced not by curvature but by the Casimir energy. The internal volume can be stabilized by this mechanism producing anti-de Sitter geometries with parametric scale separation, including an explicit example in eleven-dimensional supergravity. We study deformations of these geometries, showing the presence of perturbative and non-perturbative instabilities. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_17802 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Instabilities in scale-separated Casimir vacua Aparici, Miquel Basile, Ivano Risso, Nicolò High Energy Physics - Theory Parametric scale separation is notoriously difficult to achieve in flux compactifications of gravitational effective theories. An appealing alternative to conventional Freund-Rubin vacua involves Ricci-flat internal manifolds, where the energy supplied by fluxes is balanced not by curvature but by the Casimir energy. The internal volume can be stabilized by this mechanism producing anti-de Sitter geometries with parametric scale separation, including an explicit example in eleven-dimensional supergravity. We study deformations of these geometries, showing the presence of perturbative and non-perturbative instabilities. |
| title | Instabilities in scale-separated Casimir vacua |
| topic | High Energy Physics - Theory |
| url | https://arxiv.org/abs/2507.17802 |