|
Calendar of Physics Talks Vienna
| Revisiting cosmological applications of electromagnetic cascade theory |
| Speaker: | Pasquale Dario Serpico |
| Abstract: | Abstract: After a recap of the standard e.m. cascade theory, I will discuss a loophole that can have a large effect in the early universe, notably in altering primordial nucleosynthesis bounds on electromagnetically decaying relic particles. I will finally show how this may greatly simplify the possibility to address the long-standing "lithium problem" in terms of new physics models. |
| Date: | Tue, 24.11.2015 |
| Time: | 11:00 |
| Duration: | 60 min |
| Location: | Library, HEPHY, Nikolsdorfer Gasse 18, 1050 Wien |
| Contact: | Andreas.Goudelis@oeaw.ac.at |
| Flat Space Holographic Entanglement Entropy |
| Speaker: | Daniel Grumiller (TU Wien) |
| Abstract: | im Rahmen des Teilchenphysikseminars |
| Date: | Tue, 24.11.2015 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | H. Hüffel, H. Neufeld |
| Fano Resonances in Novel Quantum Materials |
| Speaker: | Alexander V. Boris (Max Planck Institute for Solid State Research, Stuttgart, Germany) |
| Abstract: | Fano interference, known as the quantum-mechanical interaction between continuum and embedded discrete states, is one of the most fundamental phenomena occurring in various exotic quantum phases, including graphene, spin–orbit Mott insulators, low-dimensional semiconductors, etc. In my talk, I will focus on two specific examples: (i) the observation of Fano resonances in the infrared spectra of phonons in hyper-Kagome Na3Ir3O8, and (ii) Fano interference in the excitonic insulator phase in ternary chalcogenides Ta2NiSe5.
https://www.ifp.tuwien.ac.at/www.ifp.tuwien.ac.at/fileadmin/seminar/151125_Boris_abs.pdf
|
| Date: | Wed, 25.11.2015 |
| Time: | 16:00 |
| Duration: | 45 min |
| Location: | Seminarraum DC rot 07 (roter Bereich, 7. OG), Wiedner Hauptstraße 8-10, 1040 Wien |
| Contact: | Andrei Pimenov |
| Memorable Events in Fields, Gravity and Strings |
| Speaker: | Soo-Jong Rey (Seoul National University & Institute for Basic Sciences, South Korea) |
| Abstract: | 100 years after Einstein's discovery of General Relativity the field provides an abundance of novel research directions. In this colloquium we focus on a specific one, gravitational memory.
Registering events are in general difficult for classical fields, exceedingly difficult for gravity, and deemed unimaginably difficult for strings. In this colloquium, I present undergraduate-level elementary and highly intuitive arguments for how such event memory can be registered in a simple manner. I then relate the key idea to so-called Weinberg's low-energy soft theorems and to novel (asymptotic) symmetry charges. I argue that event memories can be registered by utilizing SQUID for electromagnetic fields and D-branes for strings.
This is the public talk of the conference Vienna Central European Seminar with the topic "Quantum & Gravity".
|
| Date: | Fri, 27.11.2015 |
| Time: | 18:15 |
| Duration: | 90 min |
| Location: | Ernst-Mach lecture hall (2nd floor), University of Vienna (Boltzmanngasse 5) |
| Contact: | Daniel Grumiller |
|