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Calendar of Physics Talks Vienna
| Erwin Schrödinger Lecture: Wave localization and its landscape |
| Speaker: | Douglas N. Arnold (University of Minnesota) |
| Abstract: | The puzzling phenonenon of wave localization refers to unexpected confinement of waves triggered by disorder in the propagating media. Localization arises in many physical and mathematical systems and has many important implications and applications. A particularly important case is the Schrödinger equation of quantum mechanics, for which the localization behavior is crucial to the electrical properties of materials. Mathematically it is tied to exponential decay of eigenfunctions of operators instead of their expected extension throughout the domain. Although localization has been studied by physicists and mathematicians for the better part of a century, many aspects remain mysterious. In particular, the sort of deterministic quantitative results needed to predict, control, and exploit localization have remained elusive. |
| Date: | Mon, 16.12.2019 |
| Time: | 17:00 |
| Duration: | 60 min |
| Location: | Erwin Schrödinger Institute, Boltzmann Lecture Hall, Boltzmanngasse 9/2, 1090 Wien |
| Contact: | ESI, secr@esi.ac.at |
| A YM-like theory with infinite many fields |
| Speaker: | Loriano Bonora (SISSA, Trieste) |
| Abstract: | I will talk about the progress we have made in defining a massless field theory on a flat background with infinite many fields. It is a YM-like theory which includes also gravity, as well as tower of tensors with increasing spin. It has been derived inspired by the worldline quantization. It has a large HS gauge symmetry which includes also diffeomorphisms. I will explain its main properties and then I will show how to perturbatively quantize it. I will show as well how to define physical amplitudes and, in particular, that its is free of ghosts. It has a hidden symmetry, gauge-fixed in the initial formulation, which can be unfolded at the price of introducing nonlocalities, but I will argue that such nonlocalities are a gauge artifact. I will compare our results with the existing no-go theorems about massless HS theories in flat background. |
| Date: | Tue, 17.12.2019 |
| Time: | 13:45 |
| Duration: | 60 min |
| Location: | TU Wien, Wiedner Hauptstraße 8, Red Area, 7th floor, Seminar Room DC07 A15 |
| Contact: | S. Fredenhagen, D. Grumiller |
| Dynamics of holographic phase transitions |
| Speaker: | Maximilian Attems (Santiago de Compostela University, Spain) |
| Abstract: | In this talk I will first give some overview on the current status
of the critical point search at the Relativistic Heavy Ion Collider,
in particular focusing on the hydrodynamical description. In order to
study the general dynamics of a strongly coupled system I will introduce
a holographic non-conformal model with a first order phase transition.
Its spinodal instability corresponds on the gravity side to a
Gregory-Laflamme type of instability, which settles to a preferred
final solutions. In the final part, I will show how, in contrast to
the failure of the Mueller-Isreal description of the instability, to
surprisingly well-describe such a system by hydrodynamical relations. |
| Date: | Thu, 19.12.2019 |
| Time: | 16:00 |
| Duration: | 60 min |
| Location: | Seminar room FH gelb 10, Institute for Theoretical Physics – Vienna University of Technology, Wiedner Hauptstraße 8 – 10, 10th floor, B (yellow tower) |
| Contact: | A. Rebhan, K. Boguslavski |
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