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Calendar of Physics Talks Vienna
| On positivity of energy in higher dimensions |
| Speaker: | Piotr Chruściel (Univ. Wien) |
| Abstract: | I will review the notion of total energy of asymptotically flat and asymptotically hyperbolic manifolds in general relativity, and sketch the recent proof, together
with Erwann Delay, of positivity of hyperbolic energy in all dimensions.
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| Date: | Tue, 07.05.2019 |
| Time: | 13:45 |
| Duration: | 60 min |
| Location: | TU Wien, Wiedner Hauptstraße 8, Yellow Area, 9th floor, Seminar Room DB 09 E23 |
| Contact: | S. Fredenhagen, D. Grumiller |
| Nested soft-collinear subtraction for infrared singularities at NNLO |
| Speaker: | Raoul Roentsch (CERN) |
| Abstract: | im Rahmen des Teilchenphysikseminars |
| Date: | Tue, 07.05.2019 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | A. Hoang, S. Plätzer, M. Procura |
| Asymptotics properties of the small data solutions of the Vlasov-Maxwell system |
| Speaker: | Leo Bigorgne (Orsay) |
| Abstract: | The Vlasov-Maxwell system is a classical model in plasma physics. Glassey and Strauss proved global existence for the small data solutions of this system under a compact support assumption on the initial data. I will present how vector field methods can be applied to revisit this problem. In particular, it allows to remove all compact support assumptions on the initial data and obtain sharp asymptotics on the solutions. We will also discuss the null structure of the system which constitutes a crucial element of the proof. |
| Date: | Thu, 09.05.2019 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | Arbeitsgruppe Gravitation, Währinger Strasse 17, Raum 218, 2. Stock, 1090 Wien |
| Contact: | P.T. Chrusciel, D. Fajman |
| nEoS: Neutron Star Equation of State from hadron physics alone |
| Speaker: | Felipe J. Llanes-Estrada (Universidad Complutense Madrid) |
| Abstract: | We contribute a publicly available set of tables and code to provide Equations of State (EoS) for matter at neutron star densities. Our EoSes are constrained only by input from hadron physics and fundamental principles, without feedback from neutron star observations, and so without relying on General Relativity. They can therefore be used to test General Relativity itself, as well as modified gravity theories, with neutron star observables, without logical circularity. We have adapted state of the art results from NN chiral potentials for the low--density limit, pQCD results for the asymptotically high-density EoS, and use monotonicity and causality as the only restrictions for intermediate densities, for the EoS sets to remain as model-independent as is feasible today. |
| Date: | Thu, 09.05.2019 |
| Time: | 16:00 |
| Duration: | 60 min |
| Location: | Institute for Theoretical Physics, TU Wien, Seminar room 10th floor (yellow area), Wiedner Haupstr. 8-10, 1040 |
| Contact: | Anton Rebhan |
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