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Calendar of Physics Talks Vienna
| On Galilean Conformal Field Theory |
| Speaker: | Bin Chen (Peking U.) |
| Abstract: | In the past decade, the renaissance of conformal bootstrap has enriched our understanding of conformal field theory and AdS/CFT correspondence. It would be interesting to develop the bootstrap program for other field theories with conformal-like symmetries. In this talk, I will introduce our studies on Galilean conformal field theories in the past few years. |
| Date: | Tue, 24.05.2022 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | ZOOM: https://tuwien.zoom.us/j/95423793232?pwd=OEhvemhuaUcvbTVYS0gwV3F3amNidz09 |
| Contact: | D. Grumiller, S. Fredenhagen, E. Battista, R. Ruzziconi |
| Photocatalysis of Alcohols on Bare and Metal Cluster-Loaded TiO2(110) |
| Speaker: | Moritz Eder (TU Wien, Institut für Angewandte Physik) |
| Abstract: | Since the photoelectrochemical water splitting experiments by Fujishima and Honda in the seventies, photon-driven hydrogen evolution has been considered to be a realistic dream reaction. Titanium dioxide, the electrode used in their study, remains the most frequently investigated photocatalyst material to this day. Despite the effort in photo(electro)chemical research, there is still no consensus about fundamental mechanistic aspects, mainly due to the complexity and heterogeneity of applied systems.
By conducting alcohol photocatalysis on TiO2(110) single crystals in ultra-high vacuum, we elucidate fundamental chemical mechanisms on the surface. The research efforts of the past decade on this system show that all types of alcohols undergo the same redox chemistry. It is clear that a co-catalyst, usually in the form of small metal clusters, is necessary for photocatalytic hydrogen evol |
| Date: | Tue, 24.05.2022 |
| Time: | 16:00 |
| Location: | TU Wien, Institut für Angewandte Physik, E134 1040 Wien, Wiedner HauptstraÃe 8-10 Yellow Tower âBâ, 5th floor, SEM.R. DB gelb 05 B; https://tuwien.zoom.us/j/91946055872?pwd=ODRqZHdWTDdyOVR2emZ5WllGcFY |
| Contact: | Univ.Prof. Dr. Ulrike Diebol |
| Strongly and weakly interacting massive particles |
| Speaker: | Marco Nikolic (HEPHY) |
| Abstract: | Whereas weakly interacting massive particles (WIMPs) - a promising DM candidate - were intensively studied in the past, the theory of strongly interacting massive particles (SIMPs) has been comparably less investigated.A possible way to generate such SIMPs is through chiral symmetry breaking. We consider a dark gauge group Sp(4) and N_f=2 fermions in the pseudo-real fundamental representation.We determine the chiral Lagrangian for SIMPs with the inclusion of a mass term and the Wess-Zumino-Witten term for degenerate and non-degenerate flavors.We analyse the breaking patterns and multiplet structure including a coupling to the Standard Model with a dark U(1) sector.The complete model is supported by lattice simulations.Besides DM,the universe may also be filled in significant number with a new form of relativistic particles,dark radiation,that have escaped detection to date. Assuming .... |
| Date: | Tue, 24.05.2022 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Fakultaet für Physik, Boltzmanngasse 5,Erwin-Schroedinger-Hoersaal, 5. Stock ZOOM https://univienna.zoom.us/j/93427906843?pwd=YjhSejdUVW16QjVQYUh5TVNSNFNhQT09 |
| Contact: | A. Hoang, M. Procura |
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