Status | Confirmed |
Seminar Series | SEM-CPHT |
Subjects | hep-th |
Date | Tuesday 21 January 2020 |
Time | 11:00 |
Institute | CPHT |
Seminar Room | Salle Louis Michel |
Speaker's Last Name | Basile |
Speaker's First Name | Ivano |
Speaker's Email Address | |
Speaker's Institution | SNS-Pisa |
Title | On Vacuum Stability without Supersymmetry: Brane dynamics, bubbles and holography |
Abstract | In this talk I will present some recent results on instabilities of anti-de Sitter flux compactifications in effective field theories arising from non-supersymmetric string models, namely the USp(32) and U(32) orientifold models and the SO(16) x SO(16) heterotic string. We discuss perturbative and non-perturbative instabilities and frame the vacua in terms of brane stacks, analyzing their back-reacted geometry and reproducing AdS its near-horizon limit, then we describe the instabilities as branes separating from the stack, computing the associated decay rate matching a probe brane computation with the semi-classical Coleman-de Luccia result. We conclude briefly discussing possible implications regarding the fate of unstable vacua in string theory beyond the semi-classical limit, connecting this scenario to holographic renormalization group flows and to a "de Sitter on a brane" construction that was outlined in the recent literature. |
arXiv Preprint Number | |
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