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Calendar of Physics Talks Vienna
| Correlated electrons in non-equilibrium |
| Speaker: | Marcus Kollar (University of Augsburg) |
| Abstract: | How is a new stationary state reached in an isolated quantum‐mechanical many body system after it has been forced out of equilibrium? What are the properties of this new state, in particular, is it the thermal state expected from statistical mechanics? For correlated electrons
in condensed matter, which are not independent of each other because of the
Coulomb interaction, such questions can be investigated with time‐resolved femtosecond spectroscopy, where shortly after a first laser pulse the response to a second pulse is measured. In the talk theoretical approaches that describe the real‐time dynamics of correlated
systems are discussed, with an emphasis on nonequilibrium dynamical mean‐field theory for Hubbard‐type models. We show how time‐resolved spectroscopic data is related to the time‐dependent electronic quantum state. We discuss the formation of new stationary states, which is also of interest in view of experiments with cold atomic gases in optical
traps. |
| Date: | Mon, 18.01.2010 |
| Time: | 16:00 |
| Duration: | 45 min |
| Location: | Seminar room 138C (TU Freihaus 9. Stock, gelb) Wiedenerhauptstr. 8-12 |
| Contact: | Univ.-Prof. Dr. Karsten Held |
| Vienna Theory Lunch Club - Numerical relativity and the sound of two black holes colliding |
| Speaker: | Mark Hannam (TU Vienna) |
| Abstract: | Accurate theoretical predictions of the gravitational-wave (GW) signals produced by the merger of two black holes may be crucial for the first direct detection of GWs; they will certainly be necessary as the new field of GW astronomy develops. The GWs predicted by Einstein's equations for black-hole mergers can only be calculated by computer simulations. I will review progress in this rapidly advancing field, and the problems that must be solved before observations of black-hole mergers can become standard tools in experimental astrophysics, cosmology and fundamental physics.
Overview Lunch Seminar |
| Date: | Tue, 19.01.2010 |
| Time: | 12:30 |
| Duration: | 60 min |
| Location: | TU Vienna, Inst. f. Theoretical Physics, Freihaus, Wiedner Hauptstr. 8-10, 10. OG, SEM136 |
| Contact: | Maximilian Attems, David Burke, Marcus Huber, Theo Adaktylos |
| Die mikrolokale Spektrumsbedingung |
| Speaker: | Eric Morfa-Morales (Univ.Wien) (Fakultät für Physik) |
| Abstract: | im Rahmen des Seminars für Mathematische Physik |
| Date: | Tue, 19.01.2010 |
| Time: | 14:15 |
| Duration: | 60 min |
| Location: | Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | J. Yngvason |
| A new approach to extracting bound-state parameters from dispersive sum rules |
| Speaker: | Dmitri Melikhov (INP, Moscow State Univ. und HEPHY, Wien) (Fakultät für Physik) |
| Abstract: | im Rahmen des Teilchenphysikseminars |
| Date: | Tue, 19.01.2010 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | H. Neufeld |
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