Calendar of Physics Talks Vienna

Phase diagram of QCD in a magnetic field
Speaker:Jens O. Andersen (Norwegian University of Science and Technology)
Abstract:In this talk I will discuss recent efforts to map out the phase diagram of QCD in a magnetic background. Using the Polyakov-loop extended quark-meson model and the functional renormalization group, I will present calculations of the chiral and deconfinement transitions in the mean-field approximation and beyond. Model calculations show that the transition temperatures for the chiral and deconfinement transitions are increasing functions of the external magnetic field, which is in contradiction with lattice simulations. I will briefly discuss efforts to modify the model calculations in order to reproduce the observed behavior on the lattice.
Date: Mon, 06.10.2014
Time: 15:00
Duration: 60 min
Location:Seminar room 136, 10th floor, yellow section, Institute for Theoretical Physics, TU Wien
Contact:Andreas Schmitt

Higher spins and Lifshitz holography with isotropic scale invariance
Speaker:Stefan Prohazka (Vienna University of Technology) (The Vienna Theory Lunch Seminar)
Abstract:I will give an overview on higher spin theories in three and four dimensions and present interesting open questions. Furthermore I will answer the question if it is possible for an anisotropic Lifshitz critical point to exhibit isotropic conformal invariance by showing a concrete holographic realization.
Date: Tue, 07.10.2014
Time: 12:15
Duration: 60 min
Location:University of Vienna (Boltzmanngasse 5, 5th floor, Schroedinger Lecture Hall / large seminar room)

The effect of inhomogeneity on the evolution of the universe
Speaker:Harald Skarke (TU Vienna)
Abstract:A method for analysing the evolution of the volume of an inhomogeneous irrotational dust universe is presented. In this framework it is possible to go beyond perturbation theory in a numerical analysis. The results of such computations show that the evolution is strongly affected by inhomogeneities, but nevertheless suggest that a cosmological constant is required to account for the observed acceleration of the expansion. Possible loopholes to this conclusion will be discussed.
Date: Thu, 09.10.2014
Time: 14:00
Duration: 60 min
Location:Arbeitsgruppe Gravitation, Währinger Strasse 17, Seminarraum A, 2. Stock, 1090 Wien
Contact:P.T. Chrusciel

Introduction to heat kernels
Speaker:Dmitri Vassilevich (ABC do federal U. (Brazil))
Date: Thu, 09.10.2014
Time: 16:00
Duration: 60 min
Location:SEM 136, TU Wien, Freihaus, 10th floor (Wiedner Hauptstr. 8-10, A-1040 Vienna)
Contact:Daniel Grumiller