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Calendar of Physics Talks Vienna
| KKLT and the Swampland Conjectures |
| Speaker: | PD Dr. Ralph Blumenhagen (Max-Planck-Institut Munich) |
| Abstract: | In recent years a couple of so-called swampland conjectures have been proposed.
The idea is to extract a set of relatively simple features
that low-energy effective field theories should satisfy to admit
an embedding into a theory of quantum gravity.
After reviewing a couple of these conjectures, their relation to the KKLT scenario
of string moduli stabilization will be discussed. For this purpose, a couple
of so far ignored issues of the KKLT physics in a strongly warped throat will
be presented that eventually will lead to the proposal for quantum generalizations
of the AdS and dS swampland conjectures. |
| Date: | Tue, 03.03.2020 |
| Time: | 13:45 |
| Duration: | 60 min |
| Location: | TU Wien - Wiedner Hauptstraße 8 - Yellow Area, 9th floor |
| Contact: | D. Grumiller, S. Fredenhagen |
| The Fingerprints of Black Holes- Shadows and their Degeneracies |
| Speaker: | Claudio Paganini (Max-Planck-Institut, Potsdam) |
| Abstract: | With the advent of the first picture of a black hole taken by the Event Horizon Telescop collaboration we entered a new age of black hole research. In my talk I will ask,how much information an observer can hope to retrieve, at best, from such observations.
First I will introduce the concept of the shadow of a black hole and what it means for the shadows of two observers to be degenerate. I will then show that no continuous degenerations exist between the shadows of observers at any point in the exterior region of any Kerr-Newman black hole spacetime of unit mass and hence all parameters can in principle be extracted from an observation.
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| Date: | Thu, 05.03.2020 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | Arbeitsgruppe Gravitation, Währinger Strasse 17, Raum 218, 2. Stock, 1090 Wien |
| Contact: | D. Fajman |
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