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Calendar of Physics Talks Vienna
| Measurement based quantum optomechanics: Towards macroscopic superposition state preparation |
| Speaker: | Michael R. Vanner (CoQuS Alumnus TAlk) |
| Abstract: | For further information please visit www.coqus.at |
| Date: | Mon, 25.03.2019 |
| Time: | 17:00 |
| Duration: | 90 min |
| Location: | Main Lecture Hall Atominstitut, TU Wien, Stadionallee 2, 1020 Vienna |
| Contact: | CoQuS Administration team |
| The Status of the String Landscape |
| Speaker: | Savdeep Sethi (University of Chicago) |
| Abstract: | im Rahmen des Seminars für Mathematische Physik
(Joint TU/UV Theory Seminar)
und des ESI-Programms "Higher Spins and Holography":
Whether string theory admits a multiverse of de Sitter solutions that look approximately like our universe is a hotly debated current topic. I will overview the basics of landscape constructions and explain my view on this question. |
| Date: | Tue, 26.03.2019 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | Erwin-Schrödinger-Institute, Boltzmanngasse 9 - Boltzmann lecture hall, 2nd floor |
| Contact: | S. Fredenhagen, D. Grumiller |
| Interface analysis of plasma deposited functional layers |
| Speaker: | Guido Grundmeier (University Paderborn, Technical and Macromolecular Chemistry, Paderborn/Germany) |
| Abstract: | The deposition of thin films by plasma techniques is widely spread for applications within the fields of microelectronics, energy, medicine and packaging, among others. In spite of its ubiquity, the process is still poorly understood at a molecular level, so that the development of coatings with specific functionalities is still mostly based in trial and error approaches. The nucleation and development of internal structure within a plasma-deposited film is a complex process in which the plasma produced species intermix with the surface species in an often synergistic interplay between deposition, surface etching, and surface modification by additional energy-bringing species such as metastables, UV radiation, electron and ions. The overall goal within the collaborative Research Center “Pulsed High Power Plasmas for the Synthesis of Nanostructural Functional Layers” (TRR 87) is to explor |
| Date: | Tue, 26.03.2019 |
| 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: | Univ.Prof. Markus Valtiner |
| Speaker: | Akaki Rusetsky (Univ. Bonn) |
| Abstract: | im Rahmen des Teilchenphysikseminars |
| Date: | Tue, 26.03.2019 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | H. Neufeld |
| Atomic-scale study and engineering of low-dimensional materials |
| Speaker: | Jani Kotakoski (University of Vienna) |
| Abstract: | Despite the great promise of low-dimensional materials due to their exciting properties, they are not always directly suitable for applications. One way to tune the material properties is to manipulate the atomic structure using particle irradiation. However, as one might expect, this is challenging to do in the case of extremely thin materials, where careful control over the irradiation energy and solid understanding of the underlying atomic-scale phenomena are required. Despite the challenges, electron and ion irradiation have recently evolved into powerful techniques to manipulation the atomic structure of two-dimensional materials. At the same time, the recent advancements in aberration-corrected transmission electron microscopy both provide means to directly image the manipulated structures but also to fine tune them by inducing local structural changes and even to move defects … |
| Date: | Wed, 27.03.2019 |
| Time: | 14:15 |
| Location: | Seminar room FH gelb 10, Institute for Theoretical Physics – Vienna University of Technology, Wiedner Hauptstraße 8 – 10, 10th floor, B (yellow tower) |
| Contact: | Joachim Burgdörfer |
| Yamabe invariants and Cheeger constant on Poincaré-Einstein manifolds |
| Speaker: | Simon Raulot (Université de Rouen, Frankreich) |
| Abstract: | as part of the joint relativity-geometric analysis seminar:
In the first part of this talk, we present an elementary proof of the rigidity of the hyperbolic space as the unique Poincaré-Einstein manifold whose boundary at infinity is the conformal round sphere. The proof relies on an inequality which relates the Yamabe invariant of the boundary with the one of a compactification of the bulk manifold. In a second part, we relate the Cheeger constant of such manifolds with the conformal type of the boundary at infinity . More precisely, we prove that this constant is exactly the dimension of the interior of the Poincaré-Einstein manifold if and only if the Yamabe invariant of the boundary is non negative. Several applications are then discussed. |
| Date: | Thu, 28.03.2019 |
| Time: | 13:30 |
| Duration: | 60 min |
| Location: | Arbeitsgruppe Gravitation, Währinger Strasse 17, Raum 218, 2. Stock, 1090 Wien |
| Contact: | P.T. Chrusciel, D. Fajman |
| New Fayet-Iliopoulos terms and supersymmetric Born Infeld actions |
| Speaker: | Magnus Tournoy (Leuven) |
| Abstract: | I'll present a new way of embedding Fayet-Iliopoulos terms (FI terms) in supergravity. The construction relies on the non-linear nature of broken supersymmetry. It combines many of the tools and properties of non-linear supersymmetry that have been developed and (re-)learned over the past years. I'll explain why and how. In the second part of the talk arguments suggesting that the new FI terms might find a natural habitat in the string pheno model building landscape will be explored. We'll focus mostly on the relation of the new FI terms with supersymmetric Born-Infeld actions. |
| Date: | Thu, 28.03.2019 |
| Time: | 16:00 |
| Duration: | 60 min |
| Location: | Sem.R. DB gelb 10 - Freihaus, TU Wien |
| Contact: | Timm Wrase |
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