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Calendar of Physics Talks Vienna
| Pion-Nucleon Scattering in Lattice QCD |
| Speaker: | Valentina Verduci (Uni Graz) |
| Abstract: | We investigate the S-wave pion-nucleon scattering in lattice QCD, in order to obtain new information on the negative sector of the nucleon spectrum. This approach enables us to shed some light on the nucleon excited states and can be generalized to the study of other sectors of the QCD spectrum. |
| Date: | Tue, 11.06.2013 |
| Time: | 12:30 |
| Duration: | 60 min |
| Location: | Univ. of Vienna, Faculty of Physics, Boltzmanngasse 5, 5th floor, Erwin Schrödinger Lecture Hall |
| Contact: | Philipp Köhler, Albert Georg Passegger - www.univie.ac.at/lunch-seminar |
| Phase transitions and swelling of Lipid Multilayers: Stability under shear and pressure |
| Speaker: | Prof. Dr. Michael Grunze (Angewandte Physikalische Chemie , Universität Heidelberg, and Institute of Functional Interfaces, KIT, Karlsruhe/Germany) |
| Abstract: | In this talk I will discuss experiments to study the phase behavior of lipid multilayers in pure water, and in a model synovial fluid under pressure and shear typical in human joints. The data were taken on the new Neutron Reflectometer “Bioref” at the Helmholtz Center Berlin for Materials and Energy (HZB), which was build in a collaboration with the University of Heidelberg. “BioRef” combines neutron reflectivity and IR Reflection Spectroscopy to probe the mechanical and temperature effects on the stability and phase transitions in lipid multilayers. This allows for the first time to correlate molecular conformations in the lipid molecules with mesoscopic phase changes in the multi-lamellar system. The phase behavior of 1,2-Dimyristoyl-sn-Glycero-3-phosphocholine (DMPC) multilayers was studied both for the pure lipids, and with addition of Hyaluronic Acid (HA) to mimic the synovial fl |
| Date: | Tue, 11.06.2013 |
| Time: | 16:00 |
| Location: | Technische Universität Wien, Institut für Angewandte Physik, Seminarraum 134A, Turm B (gelbe Leitfarbe), 5. OG, 1040 Wien, Wiedner Hauptstraße 8-10 |
| Contact: | Univ.Prof. Dr. Ulrike Diebold |
| On torsion, gravity and the spectral action principle |
| Speaker: | Christoph Stephan (University of Potsdam) |
| Abstract: | For an abstract see:
http://www.mat.univie.ac.at/~gap_seminar/ |
| Date: | Wed, 12.06.2013 |
| Time: | 10:30 |
| Duration: | 60 min |
| Location: | Faculty of Mathematics, University of Vienna, Besprechungszimmer 3 (3rd floor) |
| Contact: | Volker Branding |
| Muonic Hydrogen and the Proton Radius Puzzle |
| Speaker: | Randolf Pohl (Max-Planck-Institut für Quantenoptik) |
| Abstract: | Muonic hydrogen is (μp) is the exotic hydrogen atom made from a proton and a negative muon μ-. Due to the large muon mass mμ ≈ 200me, the Bohr orbits are about 200 times smaller in mu- onic hydrogen, compared to regular hydrogen. This results in a 2003 ≈ 10^7 times larger overlap of the muon’s wave function with the proton, dramatically enhancing the sensitivity of μp energy levels to nuclear properties.
The finite size contribution to the Lamb shift in muonic hydrogen is as large as 2% of the total 2S Lamb shift.
This makes muonic hydrogen the ideal, clean, atomic system to study the proton rms charge radius.
We have recently measured two 2S-2P transitions in muonic hydrogen. From the Lamb shift we obtain a proton rms charge radius that is 10 times more accurate than the CODATA-2010 ... (full abstract is available here: https://www.smi.oeaw.ac.at/groups/hephysmiseminar/) |
| Date: | Wed, 12.06.2013 |
| Time: | 17:00 |
| Duration: | 60 min |
| Location: | Seminarroom, Boltzmanngasse 3, 1090, Wien, Stefan-Meyer-Institut, ÖAW 1F |
| Contact: | Ken Suzuki |
| Projective compactifications |
| Speaker: | Andy Cap (Vienna) |
| Abstract: | im Rahmen des Literaturseminars |
| Date: | Thu, 13.06.2013 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | Arbeitsgruppe: Gravitation, Währinger Strasse 17, Seminarraum A, 2. Stock |
| Contact: | P. Chrusciel |
| The LHC and its path towards high performance |
| Speaker: | Verena Kain (CERN, Geneva) |
| Abstract: | im Rahmen des Teilchenphysikseminars |
| Date: | Thu, 13.06.2013 |
| Time: | 14:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | H. Neufeld |
| Particle Swarm Optimization |
| Speaker: | Maximilian Hoffmann (Univ. Wien) |
| Abstract: | im Rahmen der gemeinsam veranstalteten Seminare "Komplexe Stochastische
Systeme (Univ.Wien) und "Analyse Komplexer Systeme" (Med.Univ.Wien) |
| Date: | Fri, 14.06.2013 |
| Time: | 14:15 |
| Duration: | 45 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | H. Hüffel, Stefan Thurner |
| Information processing in biological networks |
| Speaker: | Gasper Tkacik (IST Austria) |
| Abstract: | im Rahmen der gemeinsam veranstalteten Seminare "Komplexe Stochastische Systeme (Univ.Wien) und "Analyse Komplexer Systeme" (Med.Univ.Wien) |
| Date: | Fri, 14.06.2013 |
| Time: | 15:00 |
| Duration: | 45 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | H. Hüffel, Stefan Thurner |
| Quantum optics techniques support experiments in biology and medicine |
| Speaker: | Hans-A. BACHOR (Australian National University, Canberra) |
| Abstract: | Optical imaging has long been the driver for some of the most sensitive measurements. Quantum optics has made excellent progress in exploring the limits and creating new tools for communication, metrology and image processing, through both new ideas and new technologies. Can this support some parts of biology and medicine, which are areas that pose many fascinating and important research questions?
This talk starts with some examples how a combination of the latest technology of fast wavefront control, complex data processing and new concepts of multimode quantum effects has led to significant advances for secure optical communication, metrology and potentially quantum logic[1]. It follows with two examples of experiments on living organisms that have benefited directly from these advances. The first is a quantum enhancement of the measurement of the mobility of components inside a living cell, by creatively combining optical tweezers, squeezed light, and optimal mode detection [2]. The second example shows advances in in the investigation of information flow within a living brain cell [3] by stimulating neurones in a mouse brain 3D .
These are examples of new and unexpected links between rapidly evolving research fields, biology, neuroscience and photonics. This interplay of ideas and resources might be able to address some of the most interesting challenges ahead.
References
[1] S. Armstrong, J-F. Morizur, J. Janousek, B. Hage, N. Treps, P.K. Lam, H.-A. Bachor: Programmable multimode quantum networks. Nature Communications 3, 1026. Doi: 10.1038/ncomms2033 (2012)
[2] M.A. Taylor, J. Janousek, V. Daria, J. Knittel, B. Hage, H.-A. Bachor, W.P. Bowen: Biological measurement beyond the quantum limit. Nature Photonics 7, 229-233. Doi: 10.1038/nphoton.2012.246 (2013)
[3] M. A. Go, C. Stricker, S. Redman, H.-A. Bachor, V.R. Daria: Simultaneous multi-site two-photon photostimulation in three dimensions. J. Biophotonics 5, 745-753 (2012)
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| Date: | Fri, 14.06.2013 |
| Time: | 15:30 |
| Location: | TU Wien Atominstitut, Hörsaal, Stadionallee 2, 1020 Wien |
| Contact: | J. Schmiedmayer |
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