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Calendar of Physics Talks Vienna
| Anti anti-de Sitter black holes |
| Speaker: | Stéphane Detournay (Université libre de Bruxelles) |
| Abstract: | Most known black holes in 3 dimensional space-times have an entropy that can be accounted for by Cardy-type counting formulas. In almost all of these cases, the match can be traced back to the presence of an (A)dS factor either in the asymptotic or the near-horizon regions.
In this talk I will focus on space-times devoid of this property and discuss some of their geometric and thermodynamic properties.
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| Date: | Tue, 19.03.2019 |
| Time: | 14:00 |
| Location: | Boltzmann Lecture Hall 2. Stock, Boltzmanngasse 9 |
| Contact: | S. Fredenhagen, D. Grumiller, D. Erkinger, R. Wutte |
| Next-to-soft QCD corrections to hadronic cross sections |
| Speaker: | Eric Laenen (Nikhef theory group, Amsterdam) |
| Abstract: | Higher order QCD corrections can become large when kinematics forces the radiation
to be soft; this is the case near a particle production threshold. How to resum these
large logarithmic corrections to all orders is by now well-understood, but this only
holds at the leading power of the soft energy.
In this talk I will describe recent insights into the pattern of large logarithms at
next-to-leading power in the soft energy, and the first results of their resummation.
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| Date: | Tue, 19.03.2019 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | A. Hoang, H. Neufeld, S. Plätzer, M. Procura |
| Ab-initio description for propagation of extreme light pulse in solids: recent progresses |
| Speaker: | Kazuhiro Yabana (Center for Computational Sciences, University of Tsukuba, Japan) |
| Abstract: | When we theoretically investigate interaction of an intense and ultrashort laser pulse with solids, there are two aspects that should be considered: the strong electric field of the light pulse induces nonlinear electron dynamics in solids, and the nonlinear polarization that arises from the electron dynamics affects the propagation of the light pulse. To describe the propagation of the intense light pulse, it is necessary to calculate simultaneously the propagation of the light electromagnetic fields and the electron dynamics. We have developed such scheme based on ab-initio time-dependent density functional theory, and have applied the method to various problems. In my talk, I would like to show several recent progresses of our approach … |
| Date: | Thu, 21.03.2019 |
| Time: | 09:00 |
| Location: | Seminar room FH gelb 03, Institute for Theoretical Physics – Vienna University of Technology, Wiedner Hauptstraße 8 – 10, 3rd floor, B (yellow tower) |
| Contact: | Joachim Burgdörfer |
| Asymptotic symmetries of electromagnetism and gravity: a Hamiltonian study |
| Speaker: | Marc Henneaux (U Libre de Bruxelles and ESI, Vienna) |
| Abstract: | as part of the relativity and mathematical physics seminars, jointly with the ESI (Erwin-Schrödinger-Institute) "Higher Spins and Holography" Thematic Programme: The asymptotic symmetries of gravity and electromagnetism are remarkably rich. The talk will explain the asymptotic structure of gravity and electromagnetism in the asymptotically flat case by making central use of the Hamiltonian formalism. In particular, how the relevant infinite-dimensional asymptotic symmetry groups emerge at spatial infinity, and the extension to higher spacetime dimensions, will be discussed.
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| Date: | Thu, 21.03.2019 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | Erwin-Schrödinger-Institute, Boltzmanngasse 9 - Boltzmann lecture hall, 2nd floor |
| Contact: | P.T. Chrusciel, S. Fredenhagen |
| Loops in light cone perturbation theory |
| Speaker: | Tuomas Lappi (U. Jyväskylä) |
| Abstract: | Light cone perturbation theory refers to "old-fashioned" perturbation theory (as opposed to the covariant Feynman theory) with a light-like variable taking the role of time. It is the method of choice in the high energy limit of QCD for situations where a simple probe, e.g. a quark or virtual photon, interacts with the nonperturbatively strong color field of a high energy hadron or nucleus. For deep inelastic scattering this description results in the so called dipole picture, where the scattering process is described as the virtual quark fluctuating into a quark-antiquark dipole, followed by this dipole interacting with the target. The dipole picture cross section has recently been calculated to one loop order for massless quarks. Including quark masses poses both technical and conceptual challenges related to mass renormalization in a noncovariant formulation. |
| Date: | Thu, 21.03.2019 |
| Time: | 16:00 |
| Duration: | 60 min |
| Location: | Institute for Theoretical Physics, TU Wien, Seminar room 10th floor (yellow area), Wiedner Haupstr. 8-10, 1040 |
| Contact: | Anton Rebhan |
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