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Calendar of Physics Talks Vienna
| Infrateilchen und Teilchengewichte in der lokalen Quantenphysik |
| Speaker: | Albert Georg Passegger (Univ.Wien) |
| Abstract: | im Rahmen des Seminars für Mathematische Physik |
| Date: | Tue, 20.11.2012 |
| Time: | 14:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | J. Yngvason |
| Photon accumulation near a black hole |
| Speaker: | Volker Perlick (Bremen) (joint seminar with the Pauli Institute GPRS Workshop) |
| Abstract: | In the first part of the talk a Schwarzschild black hole is considered. We assume that light sources are distributed on a (big) sphere of radius R that emit, at an instant of time, photons isotropically. We calculate the resulting photon distribution and find that in the long-time limit the density becomes infinitely large near the photon sphere at r=3m. This suggests that every Schwarzschild black hole in nature should be surrounded by a shell of very high photon density which could be detrimental to the health of any observer who comes close to this region. In the second part we discuss how the situation changes if a Kerr black hole is considered. -- The first part is based on the Bachelor Thesis of Dennis Philipp and the second part is ongoing work with Arne Grenzebach. |
| Date: | Wed, 21.11.2012 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | Wolfgang Pauli Institut, Seminarraum C715, Nordbergstrasse 15/7/C, 1090 Wien |
| Contact: | P. Chrusciel |
| Hadronic contributions to the muon g-2 |
| Speaker: | Richard Williams (University of Graz) |
| Abstract: | A several year old discrepancy at the 2-3 sigma level between
precision Standard Model computations of the muon‘s magnetic
moment and experimental measurement defies theory. I quickly
review the last measurements, the various contributions to the
theory estimate that include a mind-boggling 5-loop QED calculation
as well as high-order QCD and electroweak corrections,
and concentrate especially on the hadronic contributions. I will
show how progress in the Dyson-Schwinger formulation of
Chromodynamics provides a cross-check, extension and improvement
over future lattice and existing quark model and
effective Lagrangian estimates, highlighting the strengths
and weaknesses of the various approaches. |
| Date: | Wed, 21.11.2012 |
| Time: | 17:00 |
| Duration: | 60 min |
| Location: | Stefan Meyer Institute for subatomic physics, Boltzmanngasse 3, 1090, Raum 2.08 |
| Contact: | Ken Suzuki, 01 4277 29725 |
| Finite flavour groups of fermions |
| Speaker: | Walter Grimus (Univ.Wien) |
| Abstract: | im Rahmen des Teilchenphysikseminars |
| Date: | Thu, 22.11.2012 |
| Time: | 14:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | H. Neufeld |
| Quantum many-body effects in nanosystems |
| Speaker: | Sabine Andergassen (Univ.Wien) |
| Abstract: | im Rahmen der gemeinsam veranstalteten Seminare "Komplexe Stochastische
Systeme" (Univ.Wien) und "Analyse Komplexer Systeme" (Med.Univ.Wien) |
| Date: | Fri, 23.11.2012 |
| Time: | 14:15 |
| Duration: | 45 min |
| Location: | Fakultät für Physik, Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | H. Hüffel, Stefan Thurner |
| Finite-Frequency Noise and AC Conductance of a Kondo Quantum Dot |
| Speaker: | Sarah Mueller (Univ.Wien) |
| Abstract: | im Rahmen der gemeinsam veranstalteten Seminare "Komplexe Stochastische
Systeme" (Univ.Wien) und "Analyse Komplexer Systeme" (Med.Univ. Wien) |
| Date: | Fri, 23.11.2012 |
| Time: | 15:00 |
| Duration: | 45 min |
| Location: | Fakultät für Physik, Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | H. Hüffel, Stefan Thurner |
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