Calendar of Physics Talks Vienna

Nonlinear spectroscopy of linear media
Speaker:Sergej Kulik (Moscow State University)
Abstract:Spectral measurements in the infrared (IR) optical range provide unique fingerprints of materials which are useful for material analysis, environmental sensing, and health diagnostics. Current IR spectroscopy techniques require the use of optical equipment suited for operation in the IR range, which faces challenges of inferior performance and high cost. Here we develop a spectroscopy technique, which allows spectral measurements in the IR range using visible spectral range components. The technique is based on nonlinear interference of infrared and visible photons, produced via Spontaneous Parametric Down Conversion (SPDC). The intensity interference pattern for a visible photon depends on the phase of an IR photon, which travels through the media. This allows determining absorption coefficient and refractive index of the media in the IR range from the measurements of visible photons. T
Date: Mon, 25.01.2016
Time: 17:30
Duration: 60 min
Location:Ernst-Mach Hörsaal, 2. Stck.,Strudlhofgasse 4, 1090 Wien
Contact:www.coqus.at / Christina Becker

Scattering Amplitudes and Precision Simulations for the LHC
Speaker:Stefano Pozzorini (Univ. Zürich)
Abstract:im Rahmen des Teilchenphysikseminars
Date: Tue, 26.01.2016
Time: 16:15
Duration: 60 min
Location:Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock
Contact:A. Hoang, H. Neufeld

A review of the conceptual problems raised by a precise test of the Pauli Exclusion Principle (the VIP Experiment)
Speaker:Dr. Edoardo Milotti (Dipartimento di Fisica dell'Università di Trieste and I.N.F.N.)
Abstract:Though easy to state and to understand, the Pauli Exclusion Principle poses some very special conceptual problems to those experimenters that put it to the test. These problems pop up at every stage, from the initial design of the apparatus until the final analysis. In this talk I shall discuss some of these trying but quite interesting and challenging aspects, with special reference to the VIP experiment, which is a precision test of the Pauli Exclusion Principle for electrons.
Date: Wed, 27.01.2016
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

Groups of hierarchomorphisms of trees and related Hilbert spaces
Speaker:Prof. Yuri Neretin (U Vienna/U Moscow)
Abstract:We consider groups of transformations of trees that allow cutting of a finite collection of edges (as for Thompson groups). We explain how to construct actions and unitary representations of such groups
Date: Thu, 28.01.2016
Time: 10:00
Duration: 60 min
Location:Erwin Schrödinger International Institute, Boltzmanngasse 9, 1090 Wien, Boltzmann lecture hall