|
Calendar of Physics Talks Vienna
| Is Flat-Space Holography Renormalizable? |
| Speaker: | Arnaud Delfante (University of Vienna) |
| Abstract: | Asymptotic symmetries provide a powerful window into the holographic principle. Unlike pure gauge transformations, they are associated with non-vanishing conserved charges defined at the boundary. However, near infinity the quantities entering these charges typically diverge, rendering a suitable renormalization procedure essential. While holographic renormalization is well understood in asymptotically AdS spacetimes, its flat-space counterpart remains far less developed. In this talk, I will first review the AdS framework and its renormalization program, before surveying the current state of the art in asymptotically flat backgrounds. I will emphasize the central open problems that must be resolved in order to clarify the nature of the putative dual conformal field theory. In particular, I will argue that if such a dual theory exists, whether celestial or Carrollian, it appears to be in |
| Date: | Tue, 17.03.2026 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | Erwin-Schroedinger-HS, Boltzmanngasse 5, 1090 Wien, 5.Stock |
| Contact: | S. Fredenhagen, M. Sperling |
| Laboratory constraint on the electric charge of the neutron and the neutrino |
| Speaker: | Savely G. Karshenboim (Max-Planck-Institut für Quantenoptik, Garching, 85748, Germany) |
| Abstract: | The constraints on the value of the electric charge of the neutron and the neutrinos, as well as on the electric-charge proton-electron difference ep+ ee are revisited. For details see https://indico.global/event/17165/ |
| Date: | Thu, 19.03.2026 |
| Time: | 10:00 |
| Duration: | 60 min |
| Location: | Marietta Blau Institute for Particle Physics, Dominikanerbastei 16 [PSK], 1010 Vienna, Besprechungsraum 3A.1/2 |
| Contact: | eberhard.widmann@oeaw.ac.at, claude.amsler@cern.ch, ulyana.dupletsa@oeaw.ac.at |
|