The Tadpole Problem [Remote talk]

par Severin Lust (Harvard U. )

mercredi 18 mai 2022, 16:00 → 17:00 Europe/Paris

Remote talk (LAPTh)

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.