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Calendar of Physics Talks Vienna
| Spontaneous symmetry breaking in theories with classical scale invariance |
| Speaker: | Manuel Fink und Michael Lanschützer (Univ. Wien) |
| Abstract: | im Rahmen des Seminars für Teilchenphysik |
| Date: | Tue, 30.01.2018 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | H. Neufeld |
| The Hyperfine Puzzle of Strong-Field Bound-State QED |
| Speaker: | Prof. Dr. Wilfried Nörtershäuser (Technische Universität Darmstadt) |
| Abstract: | While quantum electrodynamics is usually referred to as the most accurately tested theory, its consistency for bound electrons in strong fields is still not proven with high accuracy. The strongest magnetic fields available in the laboratory are experienced by electrons bound in highly charged, heavy ions which can be probed by hyperfine transition spectroscopy.
The transition in lithium-like Bismuth was directly observed for the first time in 2011 at the experimental storage ring ESR located at GSI Darmstadt, but the accuracy of the result was limited by the imprecise knowledge of the ion velocity and the corresponding Doppler shift.
In a recent beamtime at the ESR, we were able to reduce the uncertainties ... the result was more than 7 sigma off...
[for complete abstract visit: https://indico.smi.oeaw.ac.at/event/252/] |
| Date: | Tue, 30.01.2018 |
| Time: | 17:00 |
| Duration: | 60 min |
| Location: | Stefan-Meyer-Institut, Boltzmanngasse 3, 1090 Wien, Seminarraum 3-2-08 (2. Stock) |
| Contact: | Prof. Dr. Eberhard Widmann, Dr. Martin Simon |
| Computational thermodynamics: how to calculate phase diagrams without the fuss (nested sampling) |
| Speaker: | Dr Lívia Bartók - Pártay (Materials Chemistry Group, University of Reading , UK) |
| Abstract: | In recent years we have been working on adapting a novel computational sampling technique, called
..... NESTED SAMPLING ..... ,
for studying atomistic systems. Nested sampling automatically generates all the relevant atomic configurations, unhindered by high barriers, and one of its most appealing advantages is that the global partition function can be calculated very easily, thus thermodynamic properties, such as the heat capacity or compressibility becomes accessible.
Nested sampling samples the potential energy surface starting from the high energy region, hence no prior knowledge of the potentially stable structures is needed. This means that unlike other methods, nested sampling may be fully automated, allowing high-throughput calculations of novel materials.
https://royalsociety.org/people/livia-bartok-partay-6401/ |
| Date: | Thu, 01.02.2018 |
| Time: | 14:00 |
| Location: | Seminarraum Physik , Sensengasse 8 , Erdgeschoss, 1090 Wien |
| Contact: | http://comp-phys.univie.ac.at/ |
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