CPT

Calendar of Physics Talks Vienna

Open string theories and the Standard Model
Speaker:Pascal Anastasopoulos (TU Wien)
Abstract:We will review the basic ideas on how the Standard Model can be realized as an Open String vacuum and we will analyze some phenomenological implications of such realization.
Date: Tue, 15.03.2011
Time: 12:30
Duration: 60 min
Location:Uni Wien ( Boltzmanngasse 5, 5th floor, Schrödinger HS / large seminar room )
Contact:Nils-Ole Walliser

Lokales thermisches Gleichgewicht auf flacher und gekrümmter Raumzeit
Speaker:Jan Schlemmer (Univ. Wien)
Abstract:im Rahmen des Seminars für Mathematische Physik
Date: Tue, 15.03.2011
Time: 14:15
Duration: 60 min
Location:Fakultät für Physik, Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock
Contact:J. Yngvason

Tailoring the electronic properties of low-dimensional carbon nanostructures
Speaker:Prof. Dr. Thomas Pichler (Faculty of Physics, University of Vienna)
Abstract:The presentation will give an overview on our current research focus on the electronic properties of carbon based low dimensional quantum solids. These properties are strongly influenced by basic correlation effects. Archetypical examples of these systems are graphene, graphite and single wall carbon nanotubes (SWCNT) which are determined by the local arrangement of their sp2 hybridised carbon atoms, such that their character is either a zero gap semiconductor, semi-metallic, insulating, semiconducting or metallic. Examples of the recent work on how one can analyse these electronic properties using high energy spectroscopy (electron energy-loss, photoemission and x-ray absorption spectroscopy) as a probe will be presented. Special emphasis will be given to the influence of basic correlation effects and local field corrections on the electronic properties of graphene, graphite and SWCNT. The latter exhibit for metallic tubes a Luttinger liquid behavior. Furthermore, an overview on how to functionalize them in order to tailor their electronic structure will be given. This includes examples for the three alternative doping routes, namely, substitution, intercalation and endohedral doping (e.g. by filling with fullerenes and metallocenes) as well as examples for the growth of defined inner tubes from the different precursors via a nanochemical reaction. In comparison to graphite intercalation compounds, the electronic structure of doped graphene will be elucidated. For metallic functionalized nanotubes doping induced changes will be discussed in the framework of a dimensionality crossover which causes a change from a one-dimensional metal to a normal Fermi liquid. The detailed understanding of these fundamental electronic properties of functionalised graphite, SWCNT and graphene is the key to their future success.
Date: Tue, 15.03.2011
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

Top-Antitop Threshold - Elektroweak Contributions
Speaker:Pedro David Ruiz-Femenia (Univ. Wien, Teilchenphysik)
Abstract:im Rahmen des Teilchenphysikseminars
Date: Thu, 17.03.2011
Time: 14:15
Duration: 60 min
Location:Fakultät für Physik, Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock
Contact:A. Hoang, H. Neufeld

Cosmological models and spacelike singularities
Speaker:MMag. Dr. Johannes Markus Heinzle (Gravitationsphysik, Univ. Wien) (Fakultät für Physik)
Abstract:anlässlich des Habilitationsverfahrens für das Fach "Theoretische und Mathematische Physik"
Date: Thu, 17.03.2011
Time: 15:00
Duration: 90 min
Location:Erwin Schrödinger Institut ESI, Boltzmann-Hörsaal, Boltzmanngasse 9, 1090 Wien
Contact:J. Yngvason

Generalized Entropy and Extensivity
Speaker:Rudolf Hanel (Medizinische Univ. Wien)
Abstract:im Rahmen der gemeinsam veranstalteten Seminare "Komplexe Stochastische Systeme" (Univ.Wien) und "Analyse Komplexer Systeme" (Med.Uni Wien)
Date: Fri, 18.03.2011
Time: 14:30
Duration: 90 min
Location:Med. Univ., Bauteil 88, Informatikbibliothek, Ebene 3 (Zugang über Spitalgasse 23)
Contact:H. Hüffel, Stefan Thurner

The Erwin Schrödinger Distinguished Lecture Series - Inaugural Lecture
Speaker:Sir Anthony J. Leggett (Nobel Laureate) (Vienna Center for Quantum Science and Technology (VCQ))
Abstract:"Schroedinger's Cat and her laboratory cousins": In a famous 1935 paper,Erwin Schroedinger pointed out the bizarre consequences of extrapolating the formalism of quantum mechanics to the level of everyday life:given a suitable experimental arangement,it looks prima facie as if a cat inside a closed box cannot be said to be either alive or dead but is in a "quantum superposition" of these two very different states.Over much of the following 75 years,it was the general belief in the physics community that for various reasons it would be impossible to carry out meaningful experiments relevant to this fundamental paradox.However,over the last ten years or so various experiments have been done,in quite diverse areas of physics,which while they do not produce dead-and-alive cats nevertheless test the principle of quantum superposition at a level very much closer to our everyday experience than had been previously thought possible.I will review some of these experiments and their implications for our view of physical reality.
Date: Fri, 18.03.2011
Time: 17:30
Location:Großer Festsaal, University of Vienna, Dr. Karl-Lueger Ring 1, 1010 Wien
Contact:vcq@quantum.at