CPT

Calendar of Physics Talks Vienna

Fundamental symmetries and CPT (1/2) [Academic Training Course]
Speaker:Steven D. Bass (Stefan-Meyer-Institut für subatomare Physik, ÖAW)
Abstract:We give an introduction to fundamental symmetries in particle physics, their possible breaking and restoration. This connection between CPT and spin statistics will be discussed. The lecture will conclude with an outlook to future experiments and what symmetries we might expect to find and be broken in precision and high energy experiments.
Date: Mon, 16.12.2013
Time: 14:00
Duration: 60 min
Location:Seminarraum 2.08, Boltzmanngasse 3, 1090 Wien
Contact:Ken Suzuki

Engaging with local stakeholders: some lessons from Fukushima for recovery
Speaker:Ryugo S. HAYANO (Department of Physics, The University of Tokyo)
Abstract:The Fukushima Dai-ichi NPP accident contaminated the soil of densely-populated regions in Fukushima Prefecture with radioactive cesium, which poses significant risks of internal and external exposure to the residents. If we apply the knowledge of post-Chernobyl accident studies, internal exposures in excess of a few mSv/y would be expected to be frequent in Fukushima. Our extensive whole-body-counter surveys however showed that the internal exposure levels of residents are much lower than estimated1); in 2012-2013, the 137Cs detection percentages (the detection limit being ~300 Bq/body) are about 1% for adults, and practically 0% for children. These results are consistent with those of many other measurements/studies conducted so far in Fukushima, e.g., rice inspection, foodstuff screening and duplicate-portion studies. As such, the risk of external exposure is in general higher for the majority of residents in Fukushima. We have therefore started to deploy a new type of personal dosimeters, which can record integrated dose every hour with timestamps, in order to evaluate the risks of residents who wish to return to the 20-km evacuation zone. In these efforts, the most crucial and time consuming is to re-establish communication at all levels; between residents and local medical staff, between experts and local staff, between the central government and municipalities, and so on. 1) Hayano RS, Tsubokura M, Miyazaki M, Satou H, Sato K, Masaki S, Sakuma Y., Proc Jpn Acad Ser B 2013;89:157-63.
Date: Mon, 16.12.2013
Time: 17:30
Location:Universität Wien, Lise Meitner Hörsaal, Strudlhofgasse 4, 1090 Wien
Contact:E. Widmann

Beware of ... ”Dragons”: Divergent precursors of the Mott-Hubbard metal-insulator transition
Speaker:Thomas Schäfer (Vienna University of Technology)
Abstract:Bulk electronic correlated systems are often well described by dynam- ical mean field theory (DMFT). Amongst several successes, DMFT is able to properly describe the Mott-Hubbard metal-to-insulator transition (MIT), which is an intrinsic non-perturbative phenomenon. In this talk, after a short introduction to DMFT and the MIT at the one-particle-level, the notion of two-particle vertex functions and their necessity for exten- sions of DMFT are discussed. Furthermore, within this two-particle level framework, hallmarks of the MIT are already identified well inside the metallic phase in terms of divergences of the irreducible vertex. Specifically, the strong enhancements and the sign changes of the irreducible vertex functions, which mark this precursor of the MIT, stem from enhanced local scattering processes and can be traced in the high temperature regime up to the atomic limit.
Date: Tue, 17.12.2013
Time: 12:30
Duration: 60 min
Location:Univ. of Vienna, Faculty of Physics, Boltzmanngasse 5, 5th floor, Erwin Schrödinger Lecture Hall
Contact:Albert Georg Passegger, Peter Poier - www.univie.ac.at/lunch-seminar

Fundamental symmetries and CPT (2/2) [Academic Training Course]
Speaker:Steven D. Bass (Stefan-Meyer-Institut für subatomare Physik, ÖAW)
Abstract:We give an introduction to fundamental symmetries in particle physics, their possible breaking and restoration. This connection between CPT and spin statistics will be discussed. The lecture will conclude with an outlook to future experiments and what symmetries we might expect to find and be broken in precision and high energy experiments.
Date: Tue, 17.12.2013
Time: 14:00
Duration: 60 min
Location:Seminarraum 2.08, Boltzmanngasse 3, 1090 Wien
Contact:Ken Suzuki

Fuzzy two-dimensional hyperboloid from matrix model
Speaker:Danijel Jurman (Rudjer Boskovic Institute Zagreb)
Abstract:Non-commutative spaces could provide a framework which accommodates both quantum field theory and theory of gravity. An essential feature is that they incorporate the idea of space-time having a structure which prevents the localisation of fields to volumes smaller than certain limiting volume. In this talk we represent the fuzzy two-dimensional hyperboloid by an infinite-dimensional matrix algebra. In analogy to the fuzzy sphere, it is defined by three matrices which generate suitable unitary irreducibile representation of the su(1, 1) Lie algebra. We define the semi-classical limit and we establish a mapping from the matrix algebra generated by non-commutative coordinates to the algebra of functions on classical AdS2 and dS2 spaces. We introduce a matrix model of Yang-Mills type with the fuzzy hyperboloid as solution and discuss the effective geometry in the semi-classical limit.
Date: Tue, 17.12.2013
Time: 14:15
Duration: 60 min
Location:Erwin-Schrödinger Hörsaal, Boltzmanngasse 5
Contact:Harold Steinacker

Perturbation Theory for the Tau Hadronic Width
Speaker:Matthias Jamin (Universitat Autonoma de Barcelona)
Abstract:2. Vorlesung im Rahmen der Schrödinger-Gastprofessur 2013
Date: Tue, 17.12.2013
Time: 16:15
Duration: 60 min
Location:Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock
Contact:A. Hoang, H. Neufeld

BESIII latest results and perspectives
Speaker:Dr. Marco Maggiora (Turin)
Abstract:A short summary on the latest BESIII results will be delivered, among the others those results related to the discovery of a new "family" of charged charmonium states. New upgrade are foreseen in the next future for the BESIII spectrometer; in particular a Cylindrical GEM detector is nowadays been built by an international consortium including Italy, P.R.C., Germany and Sweden; the cylindrical GEM project will be described in details as well.
Date: Wed, 18.12.2013
Time: 16:00
Duration: 60 min
Location:Stefan-Meyer-Institut für subatomare Physik: Seminar room, Boltzmanngasse 3, Room 2.08
Contact:Ken Suzuki

Dissimilar oxide interfaces to accelerate oxygen reduction kinetics
Speaker:Ass.Prof. Bilge Yildiz (Massachusetts Institute of Technology, Department of Nuclear Science and Engineering Cambridge/USA)
Abstract:Interfaces between dissimilar oxides are attracting significant interest for their potential role in accelerating charge transport and surface reaction kinetics. If well understood and controlled, they can provide a new way to enable high-performance solid-oxide fuel cells, separation membranes as well as fast switching memristors. For example, recent studies have demonstrated that cobaltite hetero-interfaces exhibit orders of magnitude faster oxygen reduction kinetics compared with either single phase. The interfacial strain fields, anisotropy, and electronic interactions between the two phases are the likely mediators behind such an unprecedented enhancement. The underlying mechanisms must be understood quantitatively, so that we can go beyond isolated and empirically found interface structures to rationally designing dissimilar oxide interfaces with superior properties. Towards this g
Date: Wed, 18.12.2013
Time: 16:00
Location:Technische Universität Wien, GM 5 Hörsaal Chemie, Hoftrakt - Ersatz: Bauteil BE, Lückenbau, 1. Stock, Raumnummer BE0101, 1060 Wien, Getreidemarkt 9
Contact:Univ.Prof. Dr. Ulrike Diebold

Hybrid Quantum Systems: a potential route forward for distributed information processing?
Speaker:Bill MUNRO (NTT BRL Kanagawa, Japan)
Abstract:In this talk, I will discuss the use of hybrid quantum systems for distributed information processing and outline some of the challenges that one will face. I will illustrate this with several physical systems including superconducting flux qubis and electron spin ensembles.
Date: Fri, 20.12.2013
Time: 15:30
Location:Atominstitut Seminarraum, Stadionallee 2, 1020 Wien
Contact:J. Schmiedmayer