|
Calendar of Physics Talks Vienna
| Speaker: | Dionysios Anninos (King's College) |
| Date: | Mon, 11.03.2019 |
| Time: | 09:30 |
| Duration: | 60 min |
| Location: | ESI (Boltzmanngasse 9, A-1090 Vienna) |
| Contact: | Andrea Campoleoni, Stefan Fredenhagen, Matthias Gaberdiel, Daniel Grumiller, Misha Vasiliev |
| BMS on the Worldsheet: the story of Tensionless Strings |
| Speaker: | Arjun Bagchi (IIT Kanpur) |
| Date: | Tue, 12.03.2019 |
| Time: | 10:00 |
| Duration: | 60 min |
| Location: | ESI (Boltzmanngasse 9, A-1090 Vienna) |
| Contact: | Andrea Campoleoni, Stefan Fredenhagen, Matthias Gaberdiel, Daniel Grumiller, Misha Vasiliev |
| Symmetric orbifolds and tensionless string field theory |
| Speaker: | Joris Raeymaekers (Prague Institute of Physics) |
| Date: | Tue, 12.03.2019 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | ESI (Boltzmanngasse 9, A-1090 Vienna) |
| Contact: | Andrea Campoleoni, Stefan Fredenhagen, Matthias Gaberdiel, Daniel Grumiller, Misha Vasiliev |
| Searching for the Active Site in Electrocatalysis: Imaging Oxidation and Oxygen Evolution on Gold Operando |
| Speaker: | R. Kramer Campen & Katrin Domke (Fritz-Haber-Institut der Max-Planck-Gesellschaft & Max-Planck-Institut für Polymerforschung) |
| Abstract: | Conventional wisdom suggests that a heterogeneous catalyst’s activity and selectivity is governed by a small percentage of the total surface area: the active sites. However, particularly for electrocatalytic systems at buried interfaces, confirming this received wisdom and, once confirmed, exploring the nature of the active site(s), is extremely challenging. Perhaps the most straightforward way to address this problem is to image the electrocatalyst under operando conditions using approaches that provide insight into both interfacial structure and chemical speciation.
Here we address this challenge for (electro)oxidation of and oxygen evolution at a gold electrode in aqueous electrolyte over a range of length scales. Using a second harmonic generation microscope we image the oxidation and subsequent oxygen evolution at a polycrystalline Au foil over microns. We demonstrate that oxidation |
| Date: | Tue, 12.03.2019 |
| 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: | Vincent Rivasseau (Orsay, LPT) |
| Abstract: | The talk will review the current status of the tensor track, introduced about seven years ago as a program to explore quantum gravity with modern random tensor theory. Tensor models provide a sum over geometries pondered by a discretized version of the Einstein-Hilbert action. They were more recently connected to conformal field theory and toy models of quantum black holes. However their associated particle content is still unknown; it has been suggested that it could correspond to new families of higher spin theories. |
| Date: | Wed, 13.03.2019 |
| Time: | 10:00 |
| Duration: | 60 min |
| Location: | ESI (Boltzmanngasse 9, A-1090 Vienna) |
| Contact: | Andrea Campoleoni, Stefan Fredenhagen, Matthias Gaberdiel, Daniel Grumiller, Misha Vasiliev |
| Wave function collapse, gravity and cosmology |
| Speaker: | Prof. Angelo Bassi (Università degli Studi di Trieste) |
| Abstract: | To make quantum theory consistent, models of spontaneous wave function collapse (collapse models) propose to modify the Schrödinger equation by including nonlinear and stochastic terms, which describe the collapse of the wave function in space. These spontaneous collapses are “rare” for microscopic systems, hence their quantum properties are left almost unaltered. At the same time, since the collapses add coherently in composite systems, macroscopic spatial superpositions of macro-objects are rapidly suppressed. I will review the main features of collapse models, and will present an update of the most promising ways of testing them in interferometric and non-interferometric experiments, showing the current lower and upper bounds on their parameters. Next, I will discuss ideas ... [full abstract available here: https://indico.smi.oeaw.ac.at/event/302/] |
| Date: | Wed, 13.03.2019 |
| Time: | 17:00 |
| Duration: | 60 min |
| Location: | Stefan-Meyer-Institut, Boltzmanngasse 3, 1090 Wien, Seminarraum 3-2-08 (2. Stock) |
| Contact: | Prof. Dr. Eberhard Widmann, Dr. Martin Simon |
| Solving the Vasiliev equations: perturbative schemes, exact solutions, local vs. global aspects |
| Speaker: | Carlo Iazeolla (G. Marconi University) |
| Date: | Thu, 14.03.2019 |
| Time: | 10:00 |
| Duration: | 60 min |
| Location: | ESI (Boltzmanngasse 9, A-1090 Vienna) |
| Contact: | Andrea Campoleoni, Stefan Fredenhagen, Matthias Gaberdiel, Daniel Grumiller, Misha Vasiliev |
| A nonrelativistic limit of AdS perturbations |
| Speaker: | Piotr Bizon (Kraków) |
| Abstract: | I will discuss dynamics of small amplitude solutions of the Schroedinger-Newton system with an external harmonic potential. This system arises in a nonrelativistic limit from the Einstein-Klein-Gordon equations with a negative cosmological constant. The main goal is to understand the resonant transfer of energy to small spatial scales. |
| Date: | Thu, 14.03.2019 |
| Time: | 14:00 |
| Location: | Arbeitsgruppe Gravitation, Währinger Strasse 17, Raum 218, 2. Stock, 1090 Wien |
| Contact: | P.T. Chrusciel, D. Fajman |
| Higher Spin Gravities and Deformation Quantization |
| Speaker: | Evgeny Skvortsov (MPI Potsdam) |
| Date: | Thu, 14.03.2019 |
| Time: | 15:00 |
| Duration: | 60 min |
| Location: | ESI (Boltzmanngasse 9, A-1090 Vienna) |
| Contact: | Andrea Campoleoni, Stefan Fredenhagen, Matthias Gaberdiel, Daniel Grumiller, Misha Vasiliev |
| Looking for Partially-Massless Gravity |
| Speaker: | Karapet Mkrchtyan (MPI Potsdam) |
| Date: | Fri, 15.03.2019 |
| Time: | 10:00 |
| Duration: | 60 min |
| Location: | ESI (Boltzmanngasse 9, A-1090 Vienna) |
| Contact: | Andrea Campoleoni, Stefan Fredenhagen, Matthias Gaberdiel, Daniel Grumiller, Misha Vasiliev |
| The spectrum of metric-affine gravitational theories |
| Speaker: | Ergin Sezgin (Texas A&M) |
| Date: | Fri, 15.03.2019 |
| Time: | 15:00 |
| Duration: | 60 min |
| Location: | ESI (Boltzmanngasse 9, A-1090 Vienna) |
| Contact: | Andrea Campoleoni, Stefan Fredenhagen, Matthias Gaberdiel, Daniel Grumiller, Misha Vasiliev |
| Gravitation and Quantum Mechanics: the biggest crisis in modern physics? |
|