Calendar of Physics Talks Vienna

Sequential quantum measurements
Speaker:Prof. János A. Bergou (Hunter College of the City University of New York)
Abstract:The first part of the talk gives a brief introduction to quantum state discrimination. State discrimination is a fundamental measurement primitive in quantum information processing. It is the key element in quantum key distribution, security analyses and probabilistic quantum algorithms. It deals with the following problem [1]: One is given a quantum system that was prepared in one of N known quantum states, but we don't know which. The task is to identify the state of the system as well as allowed by the laws of quantum mechanics. If the possible states are not mutually orthogonal the problem is highly nontrivial and optimization with respect to some reasonable criteria leads to complex measurement strategies often involving generalized measurements. Finding the optimum measurement strategy is the subject of state discrimination. We will discuss the two commonly used optimum stra
Date: Mon, 14.01.2013
Time: 17:30
Duration: 60 min
Location:Univ. of Vienna, Ernst-Mach Hörsaal, Boltzmanngasse 5, 2nd floor, 1090 Wien
Contact:Dr. Christiane Losert / Univ. of Vienna

Micropatterned surfaces and single molecule microscopy for characterization of the cellular plasma membrane structure
Speaker:Dipl.-Ing. Stefan Sunzenauer (Technische Universität Wien, Institut für Angewandte Physik)
Abstract:In 2008 we introduced an assay for quantitative analysis of the interaction between a fluorescently marked protein (prey) and a membrane protein (bait) using microstructured surfaces, produced by µ-contact printing, covered with ligands (antibodies) targeted against the bait. The proof-of-concept was demonstrated for the interaction between CD4, a major co-receptor in T cell signalling, and Lck, a protein tyrosine kinase essential for early T cell signalling (Schwarzenbacher, et al., Nat Methods, 2008).
Since then we worked on technical advances of the assay which are presented here. A whole binding curve of secondary antibodies binding to immobilized mouse antibodies was recorded, demonstrating that our assay allows for determination of dissociation constants. The interaction between CD4 and Lck was quantitatively analyzed using this approach (Sunzenauer S, et al., Cytometry A, in press
Date: Tue, 15.01.2013
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. Gerhard Schütz

Introduction to 3-dimensional higher spin gravity
Speaker:Daniel Grumiller (TU Wien)
Abstract:im Rahmen des Literaturseminars
Date: Wed, 16.01.2013
Time: 14:15
Duration: 60 min
Location:Arbeitsgruppe: Gravitation, Währinger Strasse 17, Seminarraum A, 2. Stock
Contact:R. Beig

Kinematic power corrections in hard exclusive processes
Speaker:Vladimir M. Braun (Regensburg)
Abstract:im Rahmen des Teilchenphysikseminars
Date: Thu, 17.01.2013
Time: 14:15
Duration: 60 min
Location:Fakultät für Physik, Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock
Contact:D. Melikhov, H. Neufeld