Stable non-supersymmetric Anti-de Sitter vacua of massive IIA supergravity
Abstract
Stable non-supersymmetric Anti-de Sitter (AdS) vacua of string theory are widely believed not to exist. In this letter, we analytically compute the full bosonic Kaluza-Klein spectrum around the G2-invariant non-supersymmetric AdS4 solution of massive IIA supergravity, and show that it is perturbatively stable. We also provide evidence that six other non-supersymmetric AdS4 solutions of massive IIA supergravity are perturbatively stable. Since previous studies have indicated that these AdS vacua may also be non-perturbatively stable, our findings pose a challenge to the Swampland Conjecture.
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