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Calendar of Physics Talks Vienna
| The chiral induced spin selectivity in physics, chemistry and biology |
| Speaker: | Ron Naaman (Department of Chemical Physics, Weizmann Institute, Rehovot/Israel) |
| Abstract: | Spin based properties, applications, and devices are commonly related to magnetic
effects and to magnetic materials. However, we found that chiral organic molecules
can act as spin filters for photoelectrons transmission, in electron transfer, and in
electron transport.
The new effect, termed Chiral Induced Spin Selectivity (CISS), has interesting
implications for the production of new types of spintronics devices and on electron
transfer in biological systems. The effect was found in bio-molecules and in biosystems
like the photosystem I. It will be shown how the CISS effect may reduce the
back scattering in those systems. The basic effect, and its applications and
implications, will be presented. |
| Date: | Mon, 14.12.2015 |
| Time: | 16:00 |
| Location: | Technische Universität Wien, Institut für Angewandte Physik, E134 yellow tower „B“, 5th floor, Sem.R. DB gelb 05 A (room number DB05E11) 1040 Wien, Wiedner Hauptstraße 8-10 |
| Contact: | Univ.Prof. Dr. Ulrike Diebold |
| Organic radicals: towards magnetism in thin films of purely organic materials(?)" |
| Speaker: | Priv.Doz. Dr. Benedetta Casu (Organic radicals: towards magnetism in thin films of purely organic materials(?)) |
| Abstract: | Organic radicals are fascinating materials because of their unique properties, which make them suitable for a variety of possible applications. They are certainly promising candidates for groundbreaking applications from energy storage to quantum computing; all fields having strong social impact, with low costs, chemical flexibility, energy saving technologies and eco-friendly production playing the major roles. Although there is a huge amount of work focused on their synthesis, there are no extensive studies of their thin film properties. This is, however, a prerequisite for applications.
Inspired by this view, we have adopted a new approach towards this class of materials. We use X-ray based techniques such as X-ray photoelectron spectroscopy and microscopy, coupled to electron paramagnetic resonance spectroscopy to describe their film processes, also towards understanding magnetism |
| Date: | Tue, 15.12.2015 |
| Time: | 16:00 |
| Location: | Technische Universität Wien, Institut für Angewandte Physik, E134 yellow tower „B“, 5th floor, Sem.R. DB gelb 05 B (room number DB05L03) 1040 Wien, Wiedner Hauptstraße 8-10 |
| Contact: | Univ.Prof. Dr. Ulrike Diebold |
| Search for the violation of Pauli Exclusion principle for electrons and implications in particle physics |
| Speaker: | Catalina Curceanu (LNF-INFN, Frascati) |
| Abstract: | im Rahmen des Teilchenphysikseminars |
| Date: | Tue, 15.12.2015 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | B. Hiesmayr, H. Neufeld |
| High performance quantum computing |
| Speaker: | Matthias Troyer (ETH Zürich) |
| Abstract: | More than a century after the development of quantum mechanics we have reached an exciting time where non-trivial devices that make use of quantum effects can be built: quantum random number generators to produce true random numbers, optical lattice emulators to mimic models of condensed matter physics and quantum annealers to solve classical optimization problems. As the roadmap to building universal quantum computers becomes more concrete an important emerging question is the identification of important real-world applications of quantum computers. In order for a quantum computer to be competitive, it needs to not only be asymptotically superior but be able to solve problems within a limited time that no classical supercomputer can solve. I will review how substantial algorithmic improvements of quantum algorithms have brought problem in quantum chemistry from the realm of science fiction to being realistic applications. Similar algorithmic improvements will be needed in other areas in order to identify more “killer apps” for quantum computing.
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| Date: | Tue, 15.12.2015 |
| Time: | 17:30 |
| Duration: | 60 min |
| Location: | Technische Universität Wien, Freihaus, Hörsaal 5 |
| Contact: | J. Schmiedmayer |
| Global Nonlinear Stability of Minkowski Space for the Massless Einstein--Vlasov System |
| Speaker: | Martin Taylor (Cambridge, UK) |
| Abstract: | Massless collisionless matter is described in general relativity by the massless Einstein–Vlasov system. I will present a proof that for smooth asymptotically flat Cauchy data for this system which is sufficiently close, in a suitable sense, to the trivial solution, Minkowski space, the resulting maximal development exists globally in time and asymptotically decays appropriately. By appealing to the corresponding result for the vacuum Einstein equations, a monumental result first obtained by Christodoulou–Klainerman in the early ’90s, theproof reduces to a semi-global problem. A key step is to estimate certain Jacobi fields on the mass shell, a submanifold of the tangent bundle of the spacetime endowed with the Sasaki metric. |
| Date: | Thu, 17.12.2015 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | Arbeitsgruppe Gravitation, Währinger Strasse 17, Seminarraum A, 2. Stock, 1090 Wien |
| Contact: | P.T. Chrusciel, M. Eichmair |
| Microscopic entropy of 3D hairy black holes |
| Speaker: | Francisco Correa (Universität Hannover) |
| Date: | Thu, 17.12.2015 |
| Time: | 16:00 |
| Duration: | 60 min |
| Location: | SEM 136, TU Wien, Freihaus, 10th floor (Wiedner Hauptstr. 8-10, A-1040 Vienna) |
| Contact: | Daniel Grumiller and Johanna Knapp |
| Nocommutative Geometry, Spectral Action and the Higgs |
| Speaker: | Fedele Lizzi (University of Naples) |
| Abstract: | Im Rahmen des Seminars für Mathematische Physik: A pedagogical introduction to the noncommutative geomentry from the
spectral point of view, and its applications to the standard model of
fundamental interactions will be given. I will discuss how the SM can
be seen as a noncommutative geometry, described by the spectra of
operators, and how the Higgs field emerges naturally on a par with
the other bosons. I will also discuss the attempts to confront the
model with experiments and its possible predictive power.
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| Date: | Fri, 18.12.2015 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | H. Steinacker |
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