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Calendar of Physics Talks Vienna
| Interactions of massless bosons in three dimensions |
| Speaker: | Karapet Mkrtchyan (Max-Planck-Institut, Potsdam) |
| Abstract: | im Rahmen des Seminars für Mathematische Physik: I will present the current status of the Noether-Fronsdal program of constructing a classical action for Higher Spin Gravity and discuss the role of special dimensions.
In particular, I will provide details on the classification of cubic vertices in three dimensions, which has been completed recently.
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| Date: | Tue, 02.10.2018 |
| Time: | 13:45 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | S. Fredenhagen, D. Grumiller |
| Inclusive cross sections: localized unitarity and point-by-point cancelations |
| Speaker: | George F. Sterman (SUNY, Stony Brook) |
| Abstract: | 1. Vortrag im Rahmen der Schrödinger Gastprofessur 2018: I'll review time- and light-cone ordered perturbation theory as tools for exhibiting
the pattern of infrared cancelations in inclusive cross sections.
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| Date: | Tue, 02.10.2018 |
| Time: | 16:15 |
| Duration: | 90 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | A. Hoang, H. Neufeld |
| Isolated horizons, the Petrov type D equation and the Near Horizon Geometry equation |
| Speaker: | Jerzy Lewandowski (University of Warsaw) |
| Abstract: | 3-dimensional null surfaces that are Killing horizons to the second order are considered. They are embedded in 4-dimensional spacetimes that satisfy the vacuum Einstein equations with arbitrary cosmological constant. Internal geometry of 2-dimensional cross sections of the horizons consists of induced metric tensor and a rotation 1-form potential. It is subject to the type D equation. The equation is interesting from the both, mathematical and physical points of view. Mathematically it involves geometry, holomorphic structures and algebraic topology. Physically, the equation knows the secrete of black holes:the only axisymmetric solutions on topological sphere correspond to the the Kerr/Kerr-de Sitter/Kerr-anti-de-Sitter non-extremal black holes or to the near horizon limit of the extremal ones. In the case of bifurcated horizons the type D equation implies another spacial symmetry...... |
| Date: | Thu, 04.10.2018 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | Arbeitsgruppe Gravitation, Währinger Strasse 17, Seminarraum A, 2. Stock, 1090 Wien |
| Contact: | P.T. Chrusciel, M. Maliborski |
| Is de Sitter impossible in String Theory? |
| Speaker: | Thomas Van Riet (Leuven) |
| Abstract: | I will discuss, in pedagogical and broad terms, how string theorist go about to construct meta-stable dS vacua. Then I overview the various potential problems with those constructions and speculate on why it is not unreasonable to think that dS solutions are impossible, they are in the so-called Swampland. |
| Date: | Thu, 04.10.2018 |
| Time: | 16:00 |
| Duration: | 60 min |
| Location: | Sem.R. DB gelb 10 - Freihaus, TU Wien |
| Contact: | Timm Wrase |
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