Casimir-stabilized AdS vacua with parametric scale separation in supergravity exhibit perturbative and non-perturbative instabilities under deformations.
Bubble needs strings
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The dark bubble model realizes the dark dimension and fat graviton proposals by predicting a micron-sized extra dimension, gravity weakening at that scale, a tens-of-TeV string scale, and measurable positive spatial curvature.
String theory imposes constraints on dark energy but permits various construction attempts for de Sitter vacua and single-field exponential quintessence models despite obstructions.
citing papers explorer
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Instabilities in scale-separated Casimir vacua
Casimir-stabilized AdS vacua with parametric scale separation in supergravity exhibit perturbative and non-perturbative instabilities under deformations.
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Dark bubbles, dark dimensions and fat gravitons
The dark bubble model realizes the dark dimension and fat graviton proposals by predicting a micron-sized extra dimension, gravity weakening at that scale, a tens-of-TeV string scale, and measurable positive spatial curvature.
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Dark energy from string theory: an introductory review
String theory imposes constraints on dark energy but permits various construction attempts for de Sitter vacua and single-field exponential quintessence models despite obstructions.