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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.
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| 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) |
| Contact: | peter.poier@univie.ac.at |
| 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.
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| 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 |
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