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Calendar of Physics Talks Vienna
| Central charges in nongeometric phases from supersymmetric localization |
| Speaker: | Mauricio Romo (IAS Princeton) |
| Date: | Wed, 20.07.2016 |
| Time: | 10:00 |
| Duration: | 60 min |
| Location: | SEM DB 10 gelb, TU Wien, Freihaus, 10th floor (Wiedner Hauptstr. 8-10, A-1040 Vienna) |
| Contact: | Johanna Knapp |
| From GLSM matrix factorizations to monodromy matrices |
| Speaker: | David Erkinger (TU Wien) |
| Date: | Wed, 20.07.2016 |
| Time: | 11:30 |
| Duration: | 60 min |
| Location: | SEM DB 10 gelb, TU Wien, Freihaus, 10th floor (Wiedner Hauptstr. 8-10, A-1040 Vienna) |
| Contact: | Johanna Knapp |
| Modularity at the conifold point of the mirror quintic? |
| Speaker: | Emanuel Scheidegger (Freiburg) |
| Date: | Wed, 20.07.2016 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | SEM DB 10 gelb, TU Wien, Freihaus, 10th floor (Wiedner Hauptstr. 8-10, A-1040 Vienna) |
| Contact: | Johanna Knapp |
| Categorical Kaehler Geometry |
| Speaker: | Pranav Pandit (Uni Wien) |
| Date: | Wed, 20.07.2016 |
| Time: | 15:30 |
| Duration: | 60 min |
| Location: | SEM DB 10 gelb, TU Wien, Freihaus, 10th floor (Wiedner Hauptstr. 8-10, A-1040 Vienna) |
| Contact: | Johanna Knapp |
| Optical magnetoelectric effect and directional dichroism at the spin-wave resonances of multiferroics |
| Speaker: | David Szaller (Budapest University of Technology and Economics) |
| Abstract: | In physical systems simultaneously breaking time-reversal and spatial inversion symmetries the strength of absorption for two counter-propagating light beams can be different. This phenomenon is irrespective of the polarization state of light and is termed non-reciprocal directional dichroism. Until recent experiments on multiferroic materials this effect was generally found to be weak.
Directional dichroism in the far-infrared spectral range is the consequence of the optical magnetoelectric effect, i.e. the coupled dynamics of spins and local electric dipoles.
Our recent studies on several multiferroic compounds show that magnetoelectric spin excitations efficiently generate directional optical anisotropy leading to one-way transparency. Unidirectional optical properties, present in a large variety of multiferroic materials, can open a new horizon in photonics. |
| Date: | Wed, 20.07.2016 |
| Time: | 16:00 |
| Duration: | 45 min |
| Location: | Seminarraum DC rot 07 (Freihaus, roter Bereich, 7. OG), Wiedner Hauptstraße 8-10, 1040 Wien |
| Contact: | Andrei Pimenov |
| N=2 current and anomaly multiplets: Quantum central charges |
| Speaker: | Robert Wimmer (Americal Physical Society, Ridge, New York) |
| Abstract: | We study in detail the structure of possible currents and anomalies in N=2
supersymmetric theories that have states with nontrivial topological
(central) charges, like (confined) monopoles and non-abelian vortices. We
compare the anomalies in these theories with quantum corrections of the
central charges and show how they contribute to these corrections. |
| Date: | Thu, 21.07.2016 |
| Time: | 14:00 |
| Location: | ITP, TU Wien, Seminar room DB-gelb-10, Wiedner Hauptstr. 8-10, 1040 Wien |
| Contact: | Anton Rebhan |
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