Calendar of Physics Talks Vienna

Konforme Quantenfeldtheorie 2: Einfache Beispiele und Axiome für konforme Feldtheorien
Speaker:Gerhard Fischer (Univ. Wien)
Abstract:im Rahmen des Seminars für Mathematische Physik
Date: Tue, 01.04.2014
Time: 14:15
Duration: 60 min
Location:Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock
Contact:J. Yngvason, J. Schlemmer

News from NRQCD
Speaker:Matthias Steinhauser (KIT, Karlsruhe)
Abstract:im Rahmen des Teilchenphysikseminars
Date: Tue, 01.04.2014
Time: 16:15
Duration: 60 min
Location:Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock
Contact:A. Hoang

Newton's Law and Gravity Resonance Spectroscopy
Speaker:Hartmut Abele (Vienna)
Abstract:im Rahmen des Literaturseminars für Gravitation
Date: Thu, 03.04.2014
Time: 14:15
Duration: 60 min
Location:Arbeitsgruppe Gravitation, Währinger Strasse 17, Seminarraum A, 2. Stock, 1090 Wien
Contact:P. Chrusciel, H. Rumpf

Higher Spin Versus Renormalization Group Equations
Speaker:Ivo Sachs (LMU Munich)
Abstract:We present a variation of an earlier attempt to relate renormalization group equations to higher spin equations. We work with a scalar field theory in 3 dimensions. In this case we show that the classical renormalization group equation is a variant of the Vasiliev higher spin equations for a certain subset of couplings. For the O(N) model at large N this equivalence extends to the quantum theory also away from the conformal fixed points.
Date: Thu, 03.04.2014
Time: 16:00
Duration: 60 min
Location:SEM 136 (Freihaus, Wiedner Hauptstrasse 8-10), Institute for Theoretical Physics, Vienna University of Technology
Contact:Daniel Grumiller and Johanna Knapp

Cooking recipe for a Universe
Speaker:Daniel Grumiller (TU Wien)
Abstract:im Rahmen der gemeinsam veranstalteten Seminare "Komplexe Stochastische Systeme" (Univ. Wien) und "Analyse Komplexer Systeme" (Med. Univ. Wien)
Date: Fri, 04.04.2014
Time: 14:15
Duration: 90 min
Location:Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock
Contact:H. Hüffel und Stefan Thurner

Charge Dynamics in Broken-Symmetry Correlated States
Speaker:Prof. Leonardo Degiorgi (ETH Zurich)
Abstract:Understanding the interplay of broken-symmetry correlated states, of which spin and charge density waves (SDW and CDW) or superconductivity are primary examples, is among the most intriguing open questions of modern solid-state physics. Broken-symmetry correlated states fundamentally affect the excitation spectrum as well as charge dynamics, which can be revealed by optical methods like infrared spectroscopy. As an example, I will focus my attention on one family of the novel iron-pnictide and chalcogenide superconductors, which provide an interesting arena in order to study the impact of electronic correlations with respect to the emergence of structural/magnetic and superconducting phase transitions.
Date: Fri, 04.04.2014
Time: 14:30
Duration: 45 min
Location:Seminar Room CBEG02 (387, Photonics); Gußhausstraße 27
Contact:A. Pimenov

Steering may-body quantum dynamics
Speaker:Tommaso Clarco (Univeristy of Ulm)
Abstract:Quantum technologies are based on the manipulation of individual degrees of freedom of quantum systems with exquisite precision. Achieving this in a real environment requires pushing to the limits the ability to control the dynamics of quantum systems of increasing complexity. Optimal control techniques are known to enable steering the dynamics of few-body systems in order to prepare a desired state or perform a desired unitary transformation. I will present a recently developed optimal control method [1] that allows doing so for a many-body quantum system undergoing e.g. a quantum phase transition in the non-adiabatic regime. This opens the way to a range of applications, from the suppression of defects in a superfluid-Mott-insulator transition with ultra-cold atoms in an optical lattice to the achievement of various quantum gates at the quantum speed limit.
Date: Fri, 04.04.2014
Time: 15:30
Location:Hörsaal Atominstitut - Stationallee 2, 1020 Wien
Contact:J. Schmiedmayer