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Calendar of Physics Talks Vienna
| Generating particle-like scattering states in wave transport |
| Speaker: | Prof. Stefan Rotter (TU Wien) |
| Abstract: | I will speak about our recent work on scattering states which display trajectory-like wave function patterns in wave transport through complex systems [1]. These beam-like scattering states feature the dual property of having a well-defined scattering delay time and deterministic transmission close to 0 or 100%. An operational protocol for generating these states is put forward which is based solely on a system's scattering matrix and which we implemented numerically for ballistic and disordered scattering landscapes. I will conclude by a discussion of envisioned realizations of our ideas with electromagnetic, acoustic or matter waves with possible applications like wave focusing and secure/low-power communication [2].
[1] S. Rotter, P. Ambichl, and F. Libisch, Phys. Rev. Lett. 106, 120602 (2011).
[2] Physical Review Focus, April issue (2011).
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| Date: | Mon, 20.06.2011 |
| Time: | 14:30 |
| Duration: | 45 min |
| Location: | Freihaus Semraum 138B |
| Contact: | Prof. Karsten Held |
| Quark Matter and Neutron Stars |
| Speaker: | Mark Alford (Washington University in St Louis) |
| Date: | Mon, 20.06.2011 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Institute for Theoretical Physics, TU Wien, SEM 136, 10th floor, Wiedner Hauptstr. 8-10, 1040 Wien |
| Contact: | Andreas Schmitt |
| Vienna Theory Lunch Seminar - Black Hole Microstates |
| Speaker: | Andrea Puhm (CEA-Saclay Paris) |
| Abstract: | A century after the first black hole solution to Einstein's equation was found black holes remain an intense and puzzling area of research. While general relativity is a very good description far away from the black hole horizon quantum mechanical effects like Hawking radiation are present close to the horizon leading to apparent inconsistencies like information loss. A theory of quantum gravity is needed in order to describe black holes in full glory and to resolve these puzzles. In this talk I will introduce how black holes can be described in string theory and how ''black hole microstates'' may cure these paradoxes. Constructing such microstates is a difficult task and so far they have been found only for extremal (supersymmetric and non-supersymmetric) black holes.
Schedule Overview |
| Date: | Tue, 21.06.2011 |
| Time: | 12:30 |
| Duration: | 60 min |
| Location: | SEM 136 (Freihaus, Wiedner Hauptstrasse 8-10), Institute for Theoretical Physics, Vienna University of Technology |
| Contact: | Sabine Ertl |
| Pointlike localized observables for infinite spin Wigner representations |
| Speaker: | Christian Köhler (Univ.Wien) |
| Abstract: | im Rahmen des Seminars für Mathematische Physik |
| Date: | Tue, 21.06.2011 |
| Time: | 14:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock, 1090 Wien |
| Contact: | J. Yngvason |
| Quantum interferometric visibility as a witness of general relativistic proper time |
| Speaker: | Prof. Caslav Brukner (Wien) |
| Abstract: | Vortrag |
| Date: | Wed, 22.06.2011 |
| Time: | 16:00 |
| Duration: | 60 min |
| Location: | Arbeitsgruppe: Gravitation, Währinger Strasse 17, Seminarraum A, 2. Stock |
| Contact: | P. Chrusciel und R. Beig |
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