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Calendar of Physics Talks Vienna
| The Status of the String Landscape |
| Speaker: | Savdeep Sethi (University of Chicago) |
| Abstract: | im Rahmen des Seminars für Mathematische Physik
(Joint TU/UV Theory Seminar)
und des ESI-Programms "Higher Spins and Holography":
Whether string theory admits a multiverse of de Sitter solutions that look approximately like our universe is a hotly debated current topic. I will overview the basics of landscape constructions and explain my view on this question. |
| Date: | Tue, 26.03.2019 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | Erwin-Schrödinger-Institute, Boltzmanngasse 9 - Boltzmann lecture hall, 2nd floor |
| Contact: | S. Fredenhagen, D. Grumiller |
| Speaker: | Akaki Rusetsky (Univ. Bonn) |
| Abstract: | im Rahmen des Teilchenphysikseminars |
| Date: | Tue, 26.03.2019 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | H. Neufeld |
| Yamabe invariants and Cheeger constant on Poincaré-Einstein manifolds |
| Speaker: | Simon Raulot (Université de Rouen, Frankreich) |
| Abstract: | as part of the joint relativity-geometric analysis seminar:
In the first part of this talk, we present an elementary proof of the rigidity of the hyperbolic space as the unique Poincaré-Einstein manifold whose boundary at infinity is the conformal round sphere. The proof relies on an inequality which relates the Yamabe invariant of the boundary with the one of a compactification of the bulk manifold. In a second part, we relate the Cheeger constant of such manifolds with the conformal type of the boundary at infinity . More precisely, we prove that this constant is exactly the dimension of the interior of the Poincaré-Einstein manifold if and only if the Yamabe invariant of the boundary is non negative. Several applications are then discussed. |
| Date: | Thu, 28.03.2019 |
| Time: | 13:30 |
| Duration: | 60 min |
| Location: | Arbeitsgruppe Gravitation, Währinger Strasse 17, Raum 218, 2. Stock, 1090 Wien |
| Contact: | P.T. Chrusciel, D. Fajman |
| New Fayet-Iliopoulos terms and supersymmetric Born Infeld actions |
| Speaker: | Magnus Tournoy (Leuven) |
| Abstract: | I'll present a new way of embedding Fayet-Iliopoulos terms (FI terms) in supergravity. The construction relies on the non-linear nature of broken supersymmetry. It combines many of the tools and properties of non-linear supersymmetry that have been developed and (re-)learned over the past years. I'll explain why and how. In the second part of the talk arguments suggesting that the new FI terms might find a natural habitat in the string pheno model building landscape will be explored. We'll focus mostly on the relation of the new FI terms with supersymmetric Born-Infeld actions. |
| Date: | Thu, 28.03.2019 |
| Time: | 16:00 |
| Duration: | 60 min |
| Location: | Sem.R. DB gelb 10 - Freihaus, TU Wien |
| Contact: | Timm Wrase |
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