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Calendar of Physics Talks Vienna
| Conformal gravity in three dimensions |
| Speaker: | Hamid Afshar (University of Groningen) |
| Abstract: | Using the Chern-Simons formulation of gravity in three dimensions we study the asymptotic analysis of 3D pure/conformal gravity with Minkowskian (flat) and AdS boundary conditions. |
| Date: | Tue, 19.11.2013 |
| Time: | 12:30 |
| Duration: | 60 min |
| Location: | Univ. of Vienna, Faculty of Physics, Boltzmanngasse 5, 5th floor, Erwin Schrödinger Lecture Hall |
| Contact: | Albert Georg Passegger, Peter Poier - www.univie.ac.at/lunch-seminar |
| On the construction of relativistic quantum theories |
| Speaker: | Christian Jäckel (Univ. of Cardiff) |
| Abstract: | im Rahmen des Seminars für Mathematische Physik |
| Date: | Tue, 19.11.2013 |
| Time: | 14:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | J. Yngvason |
| Designing Surfaces with Less Friction |
| Speaker: | Prof. Nicholas D. Spencer (Laboratory for Surface Science and Technology, Department of Materials, ETH Zürich/Switzerland) |
| Abstract: | Nature lubricates in ways that often have no direct counterparts in man-made machine-element lubrication. One aspect is the lubricant, which in nature is invariably water-based, but contains additives such as glycoproteins. Another is the use of soft sliding surfaces, which are often porous and filled with viscous lubricant. By using surfaces that slowly deform on being subjected to a load, the lubricant being slowly squeezed out through the porosity, the system uses the liquid phase to share the load, and to protect the delicate porous structure from damage. A further aspect is the use of layered and gradient systems, where outer, more rigid, layers can afford protection, while the softer underlayers lead to greater compliance of the system, with potential benefits for lubrication.
We have mimicked all three natural lubrication aspects in our laboratory, using a variety of polymer brus |
| Date: | Tue, 19.11.2013 |
| Time: | 16:00 |
| Location: | Technische Universität Wien, Institut für Angewandte Physik, Seminarraum 134A, Turm B (gelbe Leitfarbe), 5. OG, 1040 Wien, Wiedner Hauptstraße 8-10 |
| Contact: | Univ.Prof. Dr. Ulrike Diebold |
| Some top-quark physics issues at the LHC |
| Speaker: | Werner Bernreuther (RWTH Aachen) |
| Abstract: | im Rahmen des Teilchenphysikseminars |
| Date: | Thu, 21.11.2013 |
| Time: | 14:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | H. Neufeld |
| Bulk and boundary unitarity in 3D massive gravity |
| Speaker: | Wout Merbis (Groningen University) |
| Abstract: | In the context of the AdS/CFT correspondence, generally-covariant three dimensional massive gravity theories suffer from a clash between bulk and boundary unitarity. After explaining the origin of this clash, we
will extend the class of 3D massive gravity models to a theory with two dynamical dreibeins, or "Zwei-Dreibein Gravity". It unifies previous theories of massive gravity and extends them to allow for positive central charge consistent with bulk unitarity.
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| Date: | Thu, 21.11.2013 |
| Time: | 16:00 |
| Duration: | 60 min |
| Location: | SEM 136 (Freihaus, Wiedner Hauptstrasse 8-10), Institute for Theoretical Physics, Vienna University of Technology |
| Contact: | Daniel Grumiller |
| Quantum to classical transitions: application to continuous time Markov processes |
| Speaker: | James Whitfield (Univ. Wien) |
| Abstract: | im Rahmen der gemeinsam veranstalteten Seminare "Komplexe Stochastische
Systeme" (Univ. Wien) und Analyse Komplexer Systeme" (Med. Univ. Wien) |
| Date: | Fri, 22.11.2013 |
| Time: | 14:15 |
| Duration: | 90 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | H. Hüffel, Stefan Thurner |
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