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Calendar of Physics Talks Vienna
| Euklidische Quantenfeldtheorie / Teil 2 |
| Speaker: | Jakob Yngvason (Univ.Wien) |
| Abstract: | im Rahmen des Seminars für Mathematische Physik |
| Date: | Tue, 12.03.2013 |
| Time: | 14:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | J. Yngvason |
| Flat Space Holography as a limit of AdS/CFT |
| Speaker: | Reza Fareghbal (IPM Teheran) |
| Abstract: | The asymptotic group of symmetries at null infinity of flat spacetimes in three and four dimensions is the infinite dimensional Bondi-Metzner-Sachs (BMS) group. This group is isomorphic to a non-relativistic limit of conformal group. We will argue that this non-relativistic limit of CFT is equivalent to the flat space limit of AdS space-times. Using this correspondence we propose a method for the study of flat-space holography as a limit of AdS/CFT.
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| Date: | Wed, 13.03.2013 |
| Time: | 15:00 |
| Duration: | 60 min |
| Location: | SEM 136 (Freihaus, Wiedner Hauptstrasse 8-10), Institute for Theoretical Physics, Vienna University of Technology |
| Contact: | Daniel Grumiller |
| Magneto-optics of graphene-based materials |
| Speaker: | A.B. Kuzmenko (University of Geneva) |
| Abstract: | Graphene attracts much attention as a novel optical and plasmonic material. Its electromagnetic response is exceptionally sensitive to a magnetic field due to the small cyclotron mass of the Dirac-like charge carriers. This does not only make infrared magneto-optics (infrared Hall effect) a valuable characterization tool, but also gives rise to giant magneto-optical effects, potentially interesting for terahertz
applications. I’ll overview our magneto-transmission and Faraday rotation studies of large-scale single- and multilayer graphene grown epitaxially on the Si- and C-faces of silicon carbide respectively [1,2,3]. I’ll consider peculiarities of the cyclotron resonance
in quasiclassical and quantum regimes and touch upon the important effect of nanoscale inhomogeneites, such as terrace steps and thermal wrinkles.
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| Date: | Wed, 13.03.2013 |
| Time: | 16:00 |
| Duration: | 45 min |
| Location: | TU Wien, Freihaus Seminarraum 138B, Turm C, 7. OG (rote Leitfarbe) |
| Contact: | Andrei Pimenov |
| Logarithmic Conformal Field Theory |
| Speaker: | Thomas Creutzig (TU Darmstadt) |
| Abstract: | Logarithmic two-dimensional CFT appears in both condensed matter
physics and the AdS/CFT correspondence.
Together with David Ridout, a method to study such theories has been
developed. I will illustrate our ideas in the well-known and
non-logarithmic example of the free boson before turning to the
logarithmic singlet theory at central charge minus two.
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| Date: | Thu, 14.03.2013 |
| 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 |
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