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Calendar of Physics Talks Vienna
| Symmetries of Strings and Branes (part 4) |
| Speaker: | Peter West (King’s College) |
| Abstract: | I will begin by explaining electro-magnetic duality symmetries in the context of supersymmetric Yang-Mills theories. I will then discuss S, T and U dualities of string theory and their implications for branes. The conjectured E11 symmetry will also be considered. |
| Date: | Tue, 10.05.2011 |
| Time: | 10:00 |
| Duration: | 120 min |
| Location: | TU Wien (Wiedner Hauptstr. 8-10), yellow area, 10th floor, seminar room E136 |
| Contact: | Sabine Ertl |
| Stability of solutions of the Camassa-Holm equation |
| Speaker: | Katrin Grunert (University of Vienna) |
| Date: | Tue, 10.05.2011 |
| Time: | 11:00 |
| Location: | Erwin Schrödinger International Institute, Boltzmanngasse 9, 1090 Wien, Schrödinger lecture hall |
| Contact: | ESI |
| Quantum kinetics of non-perturbative electron-positron production - The influence of temporal and spatial inhomogeneities |
| Speaker: | Florian Hebenstreit (Uni Graz) |
| Abstract: | Non-perturbative electron-positron pair creation in electric fields (Schwinger effect) has been a long-standing but still unobserved prediction of QED. Due to the advent of a new generation of high-intensity laser systems such as the European XFEL or the Extreme Light Infrastructure (ELI) it might, however, become possible to observe this effect within the next decades. Previous investigations led to a good understanding of the general mechanisms behind the pair creation process, however, realistic electric fields as they might be present in upcoming experiments have not been fully considered yet. In this talk I focus on various aspects of the Schwinger effect in the presence of inhomogeneous electric fields: First, I consider the pair creation process in the presence of a spatially homogeneous, time-dependent electric field. Most notably, the momentum distribution of created particles in the presence of a pulsed electric field with sub-cycle structure, which serves as a simple model of the time-dependence of a realistic laser pulse, is presented. Moreover, I introduce a formalism by means of which the Schwinger effect in the presence of space- and time-dependent electric fields can be treated properly. Finally, I present the time evolution of various observable quantities (charge distribution, momentum spectrum, number of created particles) in the presence of a simple space- and time-dependent electric field which have been calculated for the first time. |
| Date: | Tue, 10.05.2011 |
| Time: | 12:30 |
| Duration: | 60 min |
| Location: | Uni Wien ( Boltzmanngasse 5, 5th floor, Schrödinger HS / large seminar room ) |
| Contact: | Sabine Ertl |
| Speaker: | Georg Raffelt (MPI, München) |
| Abstract: | 2. Vorlesung im Rahmen der Schrödinger-Gastprofessur 2011 |
| Date: | Tue, 10.05.2011 |
| Time: | 16:15 |
| Duration: | 90 min |
| Location: | Fakultät für Physik, Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock, 1090 Wien |
| Contact: | W. Grimus, H. Neufeld |
| Speaker: | Harvey Segur (University of Colorado, Boulder) |
| Date: | Thu, 12.05.2011 |
| Time: | 11:00 |
| Location: | Erwin Schrödinger International Institute, Boltzmanngasse 9, 1090 Wien, Schrödinger lecture hall |
| Contact: | ESI |
| The role of transverse gauge links in soft-collinear effective field theory |
| Speaker: | Ignazio Scimemi (Universidad Complutense de Madrid) |
| Date: | Thu, 12.05.2011 |
| Time: | 14:15 |
| Location: | Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | André Hoang |
| On the weight of the heaviest known elementary particle |
| Speaker: | Andre Hoang (Teilchenphysik Universität Wien) |
| Abstract: | The mass and the other properties of the top quark are important since they might tell us about the currently unknown mechanism of spontaneous symmetry breaking. In particular, precise measurements of the top quark mass are a crucial ingredient for indirect searches for the mechanism of [...] |
| Date: | Thu, 12.05.2011 |
| Time: | 16:00 |
| Duration: | 60 min |
| Location: | SMI, Seminar room, Boltzmanngasse 3, 1090 Wien, Room 2.08 |
| Contact: | Roland Gsell |
| Physik und Technologie von Graphen |
| Speaker: | Hans Kuzmany (Univ.Wien) |
| Abstract: | im Rahmen der gemeinsam veranstalteten Seminare "Komplexe Stochastische Systeme" (Univ.Wien) und "Analyse Komplexer Systeme" (Med.Univ.Wien) |
| Date: | Fri, 13.05.2011 |
| Time: | 14:00 |
| Duration: | 90 min |
| Location: | Medizinische Univ., Bauteil 88, Informatikbibliothek, Ebene 3 (Zugang über Spitalgasse 23) |
| Contact: | H. Hüffel, Stefan Thurner |
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