Calendar of Physics Talks Vienna

squashed fuzzy CP^2
Speaker:Clemens Kerschbaumer (Univ. of Vienna)
Abstract:Im Rahmen des Seminars für Mathematische Physik: Among well studied fuzzy spaces like the fuzzy sphere and the fuzzy torus, extensive work on more complex flag varieties has been done. One prominent examples is fuzzy CP^2. As for the sphere, where the deformation into the squashed fuzzy S^2 gives rise to new physical properties, the fuzzy complex projective plane can be squashed along designated axes. This yields a solution of a dimensionally reduced Yang-Mills model. In this talk, some physical result as well as geometrical properties of squashed CP^2 will be discussed.
Date: Tue, 28.06.2016
Time: 14:15
Duration: 60 min
Location:Fakultät für Physik, Kleiner Seminarraum der Theor. Physik, 5. Stock Boltzmanngasse 5
Contact:H. Steinacker

Surface Chemistry of Magnetite
Speaker:MSc Oscar Alberto Gamba Vasquez (TU Wien, Insitut für Angewandte Physik, AG Oberflächenphysik)
Abstract:Understanding the interaction of metal oxides surfaces with organic molecules is a crucial aspect in research topics such as catalysis, and environmental science. Formic acid (HCOOH) and methanol (CH3OH) are often used as probe molecules to test the reactivity of metal oxide surfaces. Adsorption of both species can be molecular, as in the low temperature regime, but is frequently dissociative on surfaces that expose coordinatively unsaturated cation/anion pairs in close proximity In this talk, the study of adsorption of formic acid and methanol on the magnetite (Fe3O4) surface (a naturally abundant oxide material with high impact as catalyst in different process as such the water gas shift reaction) using X-ray photoelectron spectroscopy, infrared reflection adsorption, temperature programmed desorption and scanning tunneling microscopy will be described. On the Fe3O4 (001) surface, bo
Date: Tue, 28.06.2016
Time: 16:00
Location:Technische Universität Wien, Institut für Angewandte Physik, E134 yellow tower „B“, 5th floor, Sem.R. DB gelb 05 B (room number DB05L03) 1040 Wien, Wiedner Hauptstraße 8-10
Contact:Univ.Prof. Dr. Ulrike Diebold

Electroweak models with classical scale invariance
Speaker:Carla Schuler, Gabriel Sommer (Univ. Wien)
Abstract:im Rahmen des Teilchenphysikseminars
Date: Tue, 28.06.2016
Time: 16:15
Duration: 90 min
Location:Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock
Contact:H. Neufeld

Light Flavour production in the ALICE experiment at the LHC
Speaker:Dr. Stefania Bufalino (Politecnico di Torino and Istituto Nazionale di Fisica Nucleare di Torino)
Abstract:The ultimate goal of heavy-ion collisions is the study of the properties of the deconfined and chirally restored state of matter known as the Quark-Gluon plasma. Collisions of lead ions have been studied at the Large Hadron Collider (LHC) at a center of mass energy per nucleon √sNN = 2.76 TeV (run I), and, more recently, at √sNN = 5.02 TeV (run II). ALICE is the LHC experiment dedicated to the study of heavy ion collisions. In this seminar, the main highlights about Light Flavour production in run I and early results from run II will be presented. The measurements cover a large number of hadron species (from pions to multi-strange baryons and light nuclei) and extend to the search of (anti-)hypernuclei and exotic bound states containing a Λ hyperon, such as the H-dibaryon and Λn. The measurements in pp collisions at ... [full abstract: https://indico.smi.oeaw.ac.at/event/178/]
Date: Wed, 29.06.2016
Time: 17:00
Duration: 60 min
Location:Stefan-Meyer-Institut, Boltzmanngasse 3, 1090 Wien, Seminarraum 3-2-08 (2. Stock)
Contact:Prof. Dr. Eberhard Widmann, Dr. Martin Simon

Search for New Physics with Atomic Clocks
Speaker:Ekkehard Peik (Physikalisch-Technische Bundesanstalt, Braunschweig, Deutschland)
Abstract:The precision of atomic clocks improves at a rapid pace: While caesium clocks now reach relative uncertainties of a few 10-16, several optical clocks based on different atoms and ions are now reported with systematic uncertainties in the low 10-18 range [1]. The Yb+ optical clock at PTB has recently reached this uncertainty [2], following Hans Dehmelt’s seminal ideas of using a single trapped ion, laser cooling and the observation of quantum jumps as a spectroscopic signal, but based on an unusual reference transition (S-F electric octupole) and special Ramsey interrogation schemes that suppress systematic frequency shifts. The availability of highly precise clocks relying on different quantum systems allows for improved tests of fundamental physics, especially quantitative tests of relativity and searches for violations of the equivalence principle like variations of fundamental constants. The strong relativistic contributions to the transition energy and the high electronic angular momentum of the F-state make the Yb+ optical clock an especially sensitive test case. I will present the status and plans for such experiments at PTB.
Date: Fri, 01.07.2016
Time: 10:00
Location:Atominstitut, Hörsaal, Stadionallee 2, Wien 2
Contact:T. Schumm