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Calendar of Physics Talks Vienna
| Super-Higher-Form Symmetries and SuSymTFT |
| Speaker: | Silvia Penati (University of Milano-Bicocca) |
| Abstract: | Higher-form symmetries have revealed to be a crucial piece of information in any QFT. I will generalize their construction to theories with supersymmetry. Using a supergeometry formulation, I will discuss how topological higher-form symmetries nicely combine with supersymmetry to give rise to a brand-new set of super-higher-form symmetries, including new geometric-Chern-Weil symmetries, whose generators are constructed using invariant differential forms in supermanifolds. I will also present the novel construction of the (Super)Symmetry Topological Field Theory (SuSymTFT) that accounts for the symmetry sector of a supersymmetric theory. Super-Maxwell theory in various dimensions and the super-compact boson in two dimensions will be used as explanatory examples. |
| Date: | Tue, 20.10.2026 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | ESI - Schroedinger lecture hall, Boltzmanngasse 9, 1090 Wien |
| Contact: | S. Fredenhagen, M. Sperling |
| Capturing Surface Dynamics in CO₂/Cu(111), CO/Ni(111), and FeOₓ/CeO₂ Model Systems by Integrated Near-Ambient-Pressure Spectroscopy and Microscopy |
| Speaker: | Peter Matvija (Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University, Prague/Czech Republic) |
| Abstract: | Understanding real-world catalytic processes requires bridging the traditional pressure and complexity gaps by characterizing well-defined model surfaces under dynamic, reaction-relevant conditions. Here, we present an integrated experimental platform at the Department of Surface and Plasma Physics, Charles University, Prague, operated within the Nanomaterials Group and available to the scientific community through the open-access CERIC-ERIC framework. The system combines near-ambient-pressure X-ray photoelectron spectroscopy (NAP-XPS), near-ambient-pressure scanning tunnelling microscopy (NAP-STM), and a recently installed polarization-modulation infrared reflection absorption spectroscopy (PM-IRRAS) within a single ultrahigh-vacuum system. This configuration enables quasi-in situ characterization of the same samples using complementary structural, chemical, and vibrational techniques.
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| Date: | Tue, 20.10.2026 |
| Time: | 16:00 |
| Location: | TU Wien, Institut für Angewandte Physik, E134 1040 Wien, Wiedner Hauptstraße 8-10 Yellow Tower „B“, 5th floor, SEM.R. DB gelb 05 B |
| Contact: | Prof. Dr. Gareth Parkinson |
| DALPs: Darkly charged ALPs |
| Speaker: | María Belén GAVELA LEGAZPI (University of Madrid) |
| Abstract: | The visible world is made out of a variety of flavours and fields. In contrast, dark matter is frequently assumed to be made out of a single type of new particle. This also applies to axion-like particles (ALPs), customarily assumed to be spin zero particles with no conserved charge whatsoever.
In this talk we remove that assumption, defining and exploring darkly-charged ALPs in a model-independent way.
We build their effective Lagrangian, showing that at lowest order it contains just two operators of mass dimension six coupling darkly-charged ALPs to SM particles. The phenomenological constraints and experimental signals will be discussed, as well as the implications for the nature of dark matter. In addition, the tower of higher order operators, and illustrative examples of ultraviolet completions will be presented. |
| Date: | Tue, 20.10.2026 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Erwin-Schroedinger-HS, Boltzmanngasse 5, 1090 Wien, 5.Stock |
| Contact: | A. Hoang, M. Procura, J. Pradler |
| BKL dynamics, black hole interiors and primon gases (*note unusual time*) |
| Speaker: | Marine De Clerck (University of Cambridge) |
| Abstract: | More than 50 years ago, seminal work by Belinskii, Khalatnikov, Lifshitz (BKL) and others lead to an analytic understanding of the generic behaviour of solutions to Einstein’s equations in the approach to certain cosmological singularities. The dynamics is chaotic and can elegantly be reformulated in terms of `cosmological billiards’, in which the peculiar symmetries of the model become apparent, with deep connections to number theory. In this talk, I will give an overview of some of the recent progress in this direction. |
| Date: | Thu, 22.10.2026 |
| Time: | 11:00 |
| Duration: | 60 min |
| Location: | ITP, TU Wien, Wiedner Hauptstr. 8-10, Sem.R. DB gelb 03 |
| Contact: | Gerben Oling |
| The trade-off between quantum state discrimination and exclusion |
| Speaker: | Paul Skrzypczyk (University of Bristol ) |
| Abstract: | Given a quantum system prepared in one of several known states, one can ask which state it is, or one can ask which state it is not. These two questions define the tasks of quantum state discrimination and quantum state exclusion. In general the optimal measurements for the two tasks are different, so one cannot expect to answer both questions optimally at the same time. In this talk, I will present our results studying the trade-off between the two tasks, in which a single measurement provides a guess for each.
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| Date: | Fri, 23.10.2026 |
| Time: | 10:00 |
| Duration: | 45 min |
| Location: | Helmut Rauch Hörsaal, ATI |
| Contact: | Glaucia Murta |
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