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Calendar of Physics Talks Vienna
| Open String Field Theory with Stubs |
| Speaker: | Georg STETTINGER (CEICO Prague) |
| Abstract: | There are various reasons why adding stubs to the vertices of open string field theory (OSFT) is interesting: Not only the stubs can tame certain singularities and make the theory more well-behaved, but also the new theory shares a lot of similarities with closed string field theory, which helps to improve our understanding of its structure and possible solutions.
In this talk I will first provide a review of Witten's OSFT and then discuss how the modification using stubs leads to an A-infinity type action. I will also comment on how to find explicit solutions of the new theory. |
| Date: | Tue, 10.06.2025 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | Erwin-Schroedinger Lecture Hall, 1090 Vienna, Boltzmanngasse 5, 5th floor |
| Contact: | S. Fredenhagen, M. Sperling |
| Unveiling Magnetic Materials with Cutting-Edge Synchrotron Tools |
| Speaker: | Valerio Scagnoli (Paul Scherrer Institut, Villigen/Switzerland & ETH Zurich, Zurich/Switzerland) |
| Abstract: | Magnetism has become ubiquitous in our daily live. The prototypical horse-shoes magnet has evolved to generate different families of magnetic devices like electro-magnets, superconductive magnets, or more complex structure like composite magnetic materials used to store data in computers.
On the other hand, since their discovery, x-rays have proven as a fundamental tool to investigate solid-state physics. With the advent of synchrotron radiation intense and collimated x-ray beams are routinely available to scientist studying not only physics, but also chemistry and biology. However, due to their electromagnetic nature, x-rays are well suited to study also magnetic materials.
In this talk I will give an overview of some of the possibilities offered by synchrotron x-ray radiation to study magnetic properties in solid-state physics using techniques as X-ray Magnetic Circular Dichroism (XMCD |
| Date: | Tue, 10.06.2025 |
| 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 |
| Contact: | Prof. Dr. A. Fernandez-Pacheco |
| Particle Physics after the Higgs Discovery: Searching for Physics beyond the Standard Model |
| Speaker: | Thomas MANNEL (University of Siegen) |
| Abstract: | The discovery of a Higgs boson marked the begin of a new era in particle physics, since it completed the standard model of particle physics, leaving us with a renormalizable quantum field theory.
In this talk I will discuss, why we believe that the standard model is very likely not the final fundamental theory and what the options are to test the standard model to find physics beyond this model. |
| Date: | Tue, 10.06.2025 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Erwin-Schroedinger Lecture Hall, 1090 Vienna, Boltzmanngasse 5, 5th floor |
| Contact: | A. Hoang, H. Neufeld, J. Pradler, M. Procura |
| Tuneable universality for quantum technology |
| Speaker: | Nicolo Defenu (ETH Zürich) |
| Abstract: | The concept of universality has profoundly influenced our understanding of many-body physics, primarily within homogeneous systems, where the scaling of lattice systems can be described by continuous $\varphi^{4}$-theories in integer Euclidean dimension. In this talk, we explore universality on a non-homogeneous graph, specifically the long-range diluted graph (LRDG). Our analysis reveals that the scaling theory of such systems is governed by a single parameter, the spectral dimension $d_{s}$, which acts as the control parameter in complex geometries. The LRDG enables continuous tuning of the spectral dimension to both integer and non-integer values, allowing us to determine universal exponents as continuous functions of the dimension. The importance of having tuneable universal scaling in quantum technology will be also discussed. |
| Date: | Fri, 13.06.2025 |
| Time: | 10:00 |
| Duration: | 45 min |
| Location: | Helmut Rauch Hörsaal ATI |
| Contact: | Julian Leonard |
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