|
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 |
| 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 |
|