Calendar of Physics Talks Vienna

Dynamics of consciousness: complexity and creativity
Speaker:F. Tito Arecchi (Physics Department, University of Florence & National Institute of Optics(INO-CNR), Florence, Italy)
Abstract:The cognitive problem is how a given sensorial input elicits a decision. Since neurons undergo deterministic chaos, information is lost in course of time. Control of chaos reduces such a loss rate by adding extra degrees of freedom. This addition is a change of code; such a re-coding occurs on two time scales, namely: A) the cognitive one (lasting up to 3 sec), within which the brain reaches a collective state associated with a perception, B) the linguistic one (beyond 3 sec), whereby memory retrieves different A) units and compares them. In A) the neurons are mutually coupled in large networks; collective synchronization of neuron arrays elicit decisions. In B), separate A) slots are compared after retrieval. This requires a subject conscious of him/herself as well as of the pieces of the stream to be correlated. While in A) the neuron synchronization is described in dynamical terms, in B) the slot comparison is formalized by an inverse Bayes rule. Distinction of A), that we have in common with animals, from B) where we formulate attributions of truth, recovers the fundamental philosophical difference between apprehension and judgment.
Date: Mon, 12.04.2010
Time: 17:30
Duration: 60 min
Location:TU Wien, Schütte-Lihotzky-Hörsaal (HS7), Karlsplatz 13, Hof 2, 1040 Wien
Contact:Prof. Anton Zeilinger

Vienna Theory Lunch Club - Invisibility Devices
Speaker:Tomas Tyc (Brno University)
Abstract:Electromagnetic cloaking is a modern and rapidly developing area of optics. Its objective is to encapsulate an object into a carefully designed material with special optical properties, such that the light rays flow smoothly around the object and after passing it, restore their original direction. This creates the illusion that the space is empty. Several invisibility cloaks will be discussed in the talk with the focus on a non-Euclidean cloak that might turn invisibility into a practical technology. Lunch Club Overview
Date: Tue, 13.04.2010
Time: 12:30
Duration: 60 min
Location:Vienna University of Technology, Seminar Room E136, 10th floor
Contact:Theo Adaktylos, David Burke, Andreas Gabriel, Niklas Johansson & Christoph Spengler

Quantum Chaos and Random Matrix Theories
Speaker:Dr. Marko Robnik, CAMTP - Center for Applied Mathematics and Theoretical Physics, University of Maribor
Date: Tue, 13.04.2010
Time: 14:00
Duration: 60 min
Location:SEM 136, Institute for Theoretical Physics, Freihaus, gelber Bereich, 10. Stock
Contact:Heike Höller, Sekretariat, 13601

Series of lectures about Relativistic Quantum Field Theory (14.04. - 26.05.2010)
Speaker:Henri Verschelde & Valentine Zakharov (Vienna doctoral program on Complex Quantum Systems (CoQuS))
Abstract:We give an introduction into relativistic quantum field theory, QFT as a low energy description of systems with infinitely many degrees of freedom, we describe interaction and Feynman diagrams in QED using propagator theory, we introduce symmetries and the gauge principle , we discuss spontaneous symmetry breaking for the Higgs mechanism of Yang-Mills fields and in the context of condensed matter physics (super fluidity and superconductivity), we give an introduction into QCD and into the standard model of electroweak interactions. The aim is to get familiar with the mathematical formalism of relativistic quantum fields, of gauge theories, the modern theories of theoretical physics, in particular in the view of recent developments;
Date: Tue, 13.04.2010
Time: 15:00
Duration: 180 min
Location:Christian-Dopper-HS, 3. Stock Boltzmanngasse 5, 1090 Wien

Biomedizinische Anwendungen der Plasmatechnik
Speaker:Prof. Dr. Peter Awakowicz (Ruhr-Universität Bochum/D)
Date: Tue, 13.04.2010
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:Ao.Univ.Prof. Dr. Herbert Störi

Lattice models as algebraic dynamical systems
Speaker:Martin Göll (Univ. Wien) (Fakultät für Physik )
Abstract:im Rahmen der gemeinsam veranstalteten Seminare "Komplexe Stochastische Systeme" (Univ.Wien) und "Analyse Komplexer Systeme" (Med.Univ.Wien)
Date: Fri, 16.04.2010
Time: 14:30
Duration: 90 min
Location:Fakultät für Physik, Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock
Contact:H. Hüffel