Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Domaines hep-th
Date Mardi 24 Mai 2022
Heure 14:30
Institut LPENS
Salle L361 (24 rue Lhomond) AND zoom
Nom de l'orateur Lüst
Prenom de l'orateur Severin
Addresse email de l'orateur
Institution de l'orateur Harvard University
Titre The Tadpole Problem
Résumé I will discuss string theory compactifications where a large number of moduli is stabilized by fluxes. I will first present a conjecture which rules out the stabilization of all complex-structure moduli in F-theory at a generic point in moduli space by fluxes that satisfy the tadpole cancellation condition. Evidence for this conjecture comes from studying K3xK3 compactifications using evolutionary algorithms. Subsequently, I will discuss obstructions on flux compactifications coming from AdS/CFT holography. Here, I will argue that it is not possible to obtain KKLT-like AdS vacua with very small cosmological constants by putting a bound on the central charge of the dual theory. These results have important consequences for the construction of de Sitter vacua in string theory.
Numéro de preprint arXiv
Commentaires Hybrid seminar. Zoom link: pwd=MjhXUWRJRkpZdkRkL08xcTVDVjFHUT09 Meeting ID: 862 7114 5836 Passcode: 565571
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