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Calendar of Physics Talks Vienna
| An ultracold pizza of dipolar molecules |
| Speaker: | Matteo Ciardi (TU Wien) |
| Abstract: | Dipolar molecules are emerging as a viable ultracold platform with strong interactions, opening new possibilities for quantum metrology, computing and simulations. In our numerical simulations, performed with the Path Integral Monte Carlo (PIMC) method, we predict that exotic ultracold phases should form with realistic experimental parameters: from anisotropic droplets to monolayer crystals.
This talk will introduce the physics of ultracold dipolar molecules and their relevance to quantum many-body physics, especially for the quantum simulation of strongly correlated phases of matter. We will also discuss the basics of the PIMC simulation method, and its relevance to the description and understanding of these fascinating physical systems.
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| Date: | Tue, 16.12.2025 |
| Time: | 12:15 |
| Duration: | 60 min |
| Location: | TU Wien (TU): Wiedner Hauptstr. 8-10, green area, 5th floor, seminar room DA05E10 |
| Contact: | ivor.kresic@tuwien.ac.at |
| Integrable quantum field theories - inverse scattering, braided vector spaces, and local algebras |
| Speaker: | Gandalf LECHNER (FAU Erlangen-Nürnberg) |
| Abstract: | In relativistic integrable quantum field theories on two-dimensional Minkowski space, scattering processes take a comparatively simple form because the number of particles and the sets of incoming momenta are conserved, and the whole scattering theory is encoded in a two-particle S-"matrix". This operator is constrained by various physical requirements such as Lorentz invariance, analyticity, crossing symmetry, and the Yang-Baxter equation (braid equation), and constitutes a description of the interaction that is more direct than a classical Lagrangian density.
In this talk I will review a programme for constructing such integrable QFTs starting from their two-particle S-matrix directly in the vacuum representation (inverse scattering problem)... |
| Date: | Tue, 16.12.2025 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | Erwin-Schroedinger-Lecture Hall, 1090 Vienna, Boltzmanngasse 5, 5th floor |
| Contact: | S. Fredenhagen, M. Sperling |
| Synthesis, Surface Chemistry and Assembly of Plasmonic Nanoparticles towards New Optical Materials |
| Speaker: | Florian Schulz (University of Hamburg, Center for Hybrid Nanostructure (CHyN)) |
| Abstract: | Gold nanoparticles interact strongly with light which is the foundation of their diverse applications in sensing, surface- enhanced spectroscopies, plasmonic heating and catalysis. In this seminar, the fundamentals of synthesis, surface functionalization and characterization of plasmonic nanoparticles will be discussed. Their characteristic localized surface plasmon resonances in the optical range are already valuable in such fundamental studies. Beyond the optical regime, these nanoparticles also scatter X-rays efficiently, enabling detailed investigations of their structure, dynamics and interactions, as well as their use as tracer materials. When assembled into well-ordered superstructures, new collective plasmonic modes emerge, leading to even stronger light-matter coupling and fundamentally altering the materials’ properties. By controlling the hierarchical structure - from individu |
| Date: | Tue, 16.12.2025 |
| 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: | C. Schäfer |
| Soft Gravitons and Gravitational-Wave Opacity |
| Speaker: | Josef PRADLER (University of Vienna) |
| Abstract: | Using soft-graviton techniques, we ask whether the large graviton occupation numbers of realistic gravitational-wave sources can measurably modify particle-physics processes. For nanohertz gravitational waves, we show that previous analyses reached the qualitatively correct conclusions about their effective opacity, but for the wrong reasons. |
| Date: | Tue, 16.12.2025 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Erwin-Schroedinger-Lecture Hall, 1090 Vienna, Boltzmanngasse 5, 5th floor |
| Contact: | A. Hoang, M. Procura |
| MBI colloquium: Exploring the Uncharted Waters of Wavelike Dark Matter |
| Speaker: | Saarik Kalia (IFAE Barcelona) |
| Abstract: | Dark matter in the ultralight regime behaves like classical waves rather than particles, so unique detection strategies are needed. In this talk, we will focus on the extremely low-mass regime, which experiments have yet to explore. We will utilize precision magnetic-field measurements to navigate this parameter space. I will show how geomagnetic field data from the SuperMAG collaboration have set the first direct constraints in this regime, and I will describe ongoing efforts by the SNIPE Hunt collaboration to collect more data. I will also demonstrate that state-of-the-art magnetically levitated (Maglev) systems can act as strong probes for several models of ultralight dark matter. Finally, I will discuss recent work motivating regions of self-interacting scalar dark matter parameter space. |
| Date: | Thu, 18.12.2025 |
| Time: | 10:00 |
| Duration: | 60 min |
| Location: | Besprechungsraum 3A.1/2, PSK, Georg-Coch-Platz 2, 1010 Wien |
| Contact: | Mukul Sholapurkar (MBI), David Dobrigkeit Chinellato (MBI) |
| Particle motion in superposed gravitational fields |
| Speaker: | Marko Vojinovic (Institute of Physics University of Belgrade) |
| Abstract: | We will discuss the effective equation of motion for a small body, approximated
as a point particle, moving in a superposition of two distinct gravitational
field configurations, within the framework of an abstract model of quantum
gravity. Given some minimal general assumptions about the quantum gravity model,
and under a certain approximation scheme, one can derive an effective equation
of motion of the particle, which contains correction terms to the standard
geodesic equation. We will discuss the origin and nature of these correction
terms, especially their dependence on the interference terms between two
quantum states of the gravitational field. If time permits, we will also
comment on the implications for the weak equivalence principle. |
| Date: | Thu, 18.12.2025 |
| Time: | 14:00 |
| Duration: | 45 min |
| Location: | TU wien, Freihaus, Lecture room 2 |
| Contact: | Benjamin Koch |
| Towards an Artificial Muse for new ideas in Physics |
| Speaker: | Mario KRENN (University of Tübingen) |
| Abstract: | Artificial intelligence (AI) is a potentially disruptive tool for physics and science in general. One crucial question is how this technology can contribute at a conceptual level to help acquire new scientific understanding or inspire new surprising ideas.
I will talk about how AI can be used as an artificial muse in physics, which suggests surprising and unconventional ideas and techniques that the human scientist can interpret, understand and generalize to its fullest potential. |
| Date: | Thu, 18.12.2025 |
| Time: | 15:00 |
| Duration: | 60 min |
| Location: | Erwin-Schroedinger-Lecture Hall, 1090 Vienna, Boltzmanngasse 5, 5th floor |
| Contact: | D. Fajman |
| Magneto-ionics − controlling magnetism using electrochemical reactions |
| Speaker: | Markus Gößler (Electrochemical Sensors and Energy Storage, Institute of Chemistry, Chemnitz University of Technology, Germany) |
| Abstract: | The control of magnetism using voltages instead of magnetic fields is an important goal of current research, holding great potential for future spintronic and magnetic memory devices. An emerging, highly energy-efficient concept for the voltage control of magnetism is magneto-ionics, which utilizes electrochemical reactions for this purpose. In this talk, I will provide an overview of magneto-ionic research, introduce key methods for measuring magnetic properties in situ during electrochemical treatment, and highlight two recent examples based on hydrogen and oxygen electrochemistry.
In the first example, the reversible electrochemical hydrogen absorption into Co/Pd multilayers with perpendicular magnetic anisotropy is used to control their magnetic properties.[1] It is found that hydrogen increases coercivity continuously by up to 20% with increasing hydrogen concentration in the multi |
| Date: | Thu, 18.12.2025 |
| Time: | 16:00 |
| Location: | TU Wien, Institut für Angewandte Physik, E134 1040 Wien, Wiedner Hauptstraße 8-10 Yellow Tower „B“, 2nd floor, FH Hörsaal 3 – MATH, room no: DB 02 O13 |
| Contact: | Prof. Amalio Fernandez-Pacheco |
| Speaker: | folgt (folgt) |
| Abstract: | folgt |
| Date: | Fri, 19.12.2025 |
| Time: | 10:00 |
| Duration: | 45 min |
| Location: | Helmut Rauch Hörsaal ATI |
| Contact: | folgt |
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