Calendar of Physics Talks Vienna

Mechanical Quantum Technologies
Speaker:Peter Rabl (Atominstitut)
Abstract:The demonstration of laser cooling techniques in optomechanical systems has recently attracted a lot of interest in the quantum dynamics of micro- and nanomechanical devices. By now ground state cooling of the vibrational modes of micrometer-sized objects has been achieved, which can be seen as the first big step towards the study of quantum mechanics on a macroscopic scale. Beyond new possibilities to address fundamental questions in quantum physics, these developments also provide the foundation for new, phonon-based quantum technologies and in this talk I will present some of the prospects for opto- and nanomechanical systems for future quantum information processing applications. I will first discuss an all optomechanical approach towards non-linear quantum optics on a single photon level and in the second part describe recent results on phonon-mediated spin-spin interactions in dia
Date: Mon, 29.10.2012
Time: 17:30
Duration: 60 min
Location:Univ. of Vienna, Ernst-Mach Hörsaal, Boltzmanngasse 5, 2nd floor, 1090 Wien
Contact:Dr. Christiane Losert / Univ. of Vienna

Tight-binding description of graphene: edges, magnetic fields and substrates
Speaker:Rafael Reiter (TU Wien)
Abstract:The experimental realization of graphene has opened a rapidly developing new field of fundamental and applied physics. Concerning the theoretical description of the electronic structure, the tight-binding approximation has the advantage that it can describe extended graphene systems with millions of atoms and magnetic fields, electric fields, substrates and disorder. After a review of the tight-binding formalism and its applications, the talk will focus on magnetic fields and the exact description of substrates and edges.
Date: Tue, 30.10.2012
Time: 12:30
Duration: 60 min
Location:TU Vienna, Wiedner Hauptstr. 8-10, yellow area, 10th floor, seminar room E136
Contact:F. Brünner, S. Frank, P. Köhler, A. G. Passegger, S. Stetina

Novel QCD Phenomena
Speaker:Stanley J. Brodsky (Stanford University)
Abstract:I will discuss several novel and unexpected aspects of quantum chromodynamics. These include: (a) the physics of intrinsic strange, charm and bottom quarks in the nucleon at large x and the consequences for Higgs hadroproduction (b) the breakdown of pQCD factorization theorems due to the lensing effects of initial- and final-state interactions; (c) important corrections to pQCD scaling for inclusive reactions due to processes in which hadrons are created at high transverse momentum directly in the hard processes -- and the consequences for the „baryon anomaly“ in high-centrality heavy-ion collisions; and (d) the nonuniversality of quark distributions in nuclei. I will also briefly discuss some novel theoretical perspectives in QCD
Date: Tue, 30.10.2012
Time: 14:00
Duration: 60 min
Location:Institut für Hochenergiephysik, 1050 Wien, Nikolsdorfer Gasse 18, Bibliothek, 1. Stock
Contact:Ken Suzuki, 01 4277 29725

Geometrie der Darstellungen mit unendlichem Spin
Speaker:Christian Köhler (Univ. Wien)
Abstract:im Rahmen des Seminars für Mathematische Physik
Date: Tue, 30.10.2012
Time: 14:15
Duration: 60 min
Location:Fakultät für Physik, Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock
Contact:J. Yngvason