Calendar of Physics Talks Vienna

Atomically Precise Nanoscale Contacts

Speaker:Paul S. Weiss (California NanoSystems Institute and Departments of Chemistry & Biochemistry and Materials Science & Engineering, UCLA, Los Angeles/CA)
Abstract:The physical, electronic, mechanical, and chemical connections that materials make to one another and to the outside world are critical. Just as the properties and applications of conventional semiconductor devices depend on these contacts, so do nanomaterials, many nanoscale measurements, and devices of the future. We discuss the important roles that these contacts can play in preserving key transport and other properties. Initial nanoscale connections and measurements guide the path to future opportunities and challenges ahead. Band alignment and minimally disruptive connections are both targets and can be characterized in both experiment and theory. I discuss our initial forays into this area in a number of materials systems.
Date: Tue, 05.04.2016
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

Chiral-Scale Perturbation Theory, Renormalization Group, and the Higgs Boson
Speaker:Rodney Crewther (Univ. Adelaide)
Abstract:im Rahmen des Teilchenphysikseminars
Date: Tue, 05.04.2016
Time: 16:15
Duration: 60 min
Location:Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock
Contact:G. Ecker

GRAVITATIONSWELLEN – Von der Theorie zur Beobachtung
Speaker:Prof. Dr. Peter C. Aichelburg und Prof. Dr. Helmut Rumpf (Universität Wien, Fakultät für Physik Gravitationsphysik)
Abstract:Vortrag Aichelburg und Rumpf
Date: Tue, 05.04.2016
Time: 17:30
Duration: 60 min
Location:Fakultät für Physik, Lise-Meitner-Hörsaal, Boltzmanngasse 5, 1. Stock

The response of semi-holographic non-Fermi liquids
Speaker:Giuseppe Policastro (ENS Paris)
Abstract:In recent years, the holographic correspondence has been used in many contexts to explore properties of strongly coupled systems that are hard to obtain by conventional methods. One of these areas is that of high-T superconductors. It is believed that the normal (non-superconducting) phase in these systems shows evidence of non-Fermi liquid behavior. Motivated by these considerations, I will present some recent progress in understanding the properties of certain models of interacting non-Fermi liquids obtained via a semi-holographic construction. I will discuss the similarities and difference with the ordinary Fermi liquids and the phenomenological applications.
Date: Wed, 06.04.2016
Time: 14:15
Location:Seminar room DB-gelb-10, 10th floor, TU Wien, Wiedner Hauptstr. 8-10, 1040
Contact:Anton Rebhan

Associated Strangeness Production in Proton-Proton Interactions
Speaker:Dr. Florian Hauenstein (Forschungszentrum Jülich)
Abstract:The associated strangeness production in pp interactions has been studied with the COSY-TOF detector in the reaction pp → pK+Λ close to threshold. The underlying reaction mechanisms are not fully understood since perturbative QCD calculations can not be applied at this energy regime. What has been determined so far is a strong influence of N* resonances in the reaction, a strong pΛ final state interaction and a NΣ - pΛ channel coupling which leads to an cusp effect in the pΛ invariant mass spectrum. The latest measurements at COSY-TOF have been carried out with a polarized proton beam. This allows also the determination of polarization observables such as the spin transfer of the beam to the Λ or the analyzing power of the final state particles. These polarization observables could improve the understanding ... [ full abstract here: https://indico.smi.oeaw.ac.at/event/153 ]
Date: Wed, 06.04.2016
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

Geometry of the Hilbert space for three fermions with six single-particle states
Speaker:Alex Gottlieb (WPI, Vienna)
Abstract:im Rahmen des Seminars in Geometric Analysis and Physics (GAP Seminar): The Hilbert space for a single particle with six basic quantum states is the standard 6- dimensional complex space V, and the Hilbert space for a system of three fermions with six single- particle states is the (alternating) tensor product space V^V^V, a 20-dimensional space. The simplest vectors in V^V^V are "decomposable" wedge products of three vectors from V. Every vector in V^V^V can be written as a sum of three decomposables, and most can be written as a sum of just two. Every vector in V^V^V can be written -- in various ways -- as a linear combinati - on of at most five decomposable wedge products of vectors drawn from a single orthonormal basis of V. These multilinear algebraic properties of vectors in V^V^V are related to the geometry of that space.
Date: Fri, 08.04.2016
Time: 11:30
Duration: 90 min
Location:Fakultät für Mathematik, SR 11, 2. Stock, Oskar-Morgenstern-Platz 1, 1090 Wien
Contact:M. Bauer (Fak. Math, U.V.), V. Branding (Fak. Math, T.U.), D. Fajman (Fak. Phys, U.V.), J. Joudioux (Fak. Phys, U.V.), B. Schörkhuber (Fak. Math.,V.U.)