Calendar of Physics Talks Vienna

The W.K.B.-Method
Speaker:Clemens Kerschbaumer (Uni Wien)
Abstract:im Rahmen des Seminars für Mathematische Physik
Date: Tue, 08.01.2013
Time: 14:15
Duration: 60 min
Location:Fakultät für Physik, Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock
Contact:J. Yngvason

Additive Manufacturing Technologies (Two-Photon Polymerization, DLP-based Stereolithography, Selective Laser Melting)
Speaker:Dipl.-Ing. Jan Torgersen, Dipl.-Ing. Simon Gruber, Markus Hatzenbichler, MSc. (TU Wien, Institut für Werkstoffwissenschaft und Werkstofftechnologie)
Abstract:Conventional subtractive manufacturing methods are limited by means of undercuts, thin walls and specific tools are needed to create the structures. In the case of additive manufacturing (AM), the same structures are built layer-by-layer out of solid or liquid feedstock overcoming these limitations. Three different AM methods are investigated at the Institute for Material Science and Technology (TU Vienna), workgroup of Prof. Dr. Jürgen Stampfl; two-photon photopolymerisation (2PP), digital light processing (DLP) based stereolithography and selective laser melting (SLM). In case of SLM, we process monitoring methods using image data processing to assess powder bed failures. We further characterise the mechanics of medical titanium and investigate the usability of high performance ceramic powders. With DLP based AM, 3D parts are made from a photosensitive slurry containing ceramic partic
Date: Tue, 08.01.2013
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:Ao.Univ.Prof. Dr. Herbert Störi

Yang-Mills field on extreme Reissner-Nordstrom background
Speaker:Michal Kahl (Kraków)
Abstract:im Rahmen des Literaturseminars
Date: Wed, 09.01.2013
Time: 14:15
Duration: 60 min
Location:Fakultät für Physik, Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock
Contact:P. Chrusciel

The early history of QCD
Speaker:Gerhard Ecker (Uni Wien)
Abstract:im Rahmen des Teilchenphysikseminars
Date: Thu, 10.01.2013
Time: 14:15
Duration: 60 min
Location:Fakultät für Physik, Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock
Contact:H. Neufeld

Projection Operator Techniques for Generalized Langevin Equations: A Case Study
Speaker:Florentin Harbich (Univ.Wien)
Abstract:im Rahmen der gemeinsam veranstalteten Seminare "Komplexe Stochastische Systeme" (Univ.Wien) und "Analyse Komplexer Systeme" (Mediz.Univ.Wien)
Date: Fri, 11.01.2013
Time: 14:15
Duration: 90 min
Location:Medizinische Universität Wien, Informatikbibliothek Bauteil 88, E 03, Spitalgasse 23
Contact:H. Hüffel, Stefan Thurner

Non-equilibrium and non-harmonic atomic BECs
Speaker:Zoran HADZIBABIC (Cavendish Laboratory, Cambridge, UK)
Abstract:I will give an overview of our recent experiments on atomic Bose gases with tuneable interactions and in various geometries. By tuning the strength of interactions in a harmonically trapped sample we have created a superheated Bose-condensed gas, in which a BEC survives above the equilibrium critical temperature for up to a minute. We have experimentally reconstructed a non-equilibrium phase diagram of this system and theoretically reproduced our observations [1]. In an optical ring trap, we have observed quantised supercurrents lasting for over two minutes, and have extended the studies of persistent currents to spinor condensates [2]. Most recently, we have also observed first Bose-Einstein condensation of atoms in a (quasi-)uniform potential, opening many new possibilities for fundamental many-body studies [3]. [1] A. L. Gaunt et al., arXiv1212.5833 [2] S. Beattie at al., arXiv:1210.4834 [3] A. L. Gaunt et al., arXiv:1212.4453
Date: Fri, 11.01.2013
Time: 15:30
Location:Atominstitut, Hörsaal, Stadionallee 2, 1020 Wien
Contact:J. Schmiedmayer