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Calendar of Physics Talks Vienna
| Speaker: | John Ellis (CERN) |
| Abstract: | This is the question all particle physicists are asking after the
discovery of the Higgs boson. This talk will discuss what the Higgs
boson may be telling us, and foci on supersymmetry as a possible
extension of the Standard Model. Probes of possible new physics at
the LHC and possible future colliders will also be discussed.
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| Date: | Wed, 11.03.2015 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | Ludwig-Boltzmann-Hörsaal, Erdgeschoss, Strudlhofgasse 4, 1090 Wien |
| Contact: | A. Hoang, H. Neufeld |
| Universality and scaling in tunable Luttinger spin liquids |
| Speaker: | Andrey ZHELUDEV (ETH Zurich) |
| Abstract: | Landau's theory of Fermi liquids, which is the cornerstone of our understanding of fermionic systems, breaks down in low dimensions. In one dimension, interacting fermions are in a quantum critical state with some fascinating universal thermodynamic properties and correlation functions. This particularly interesting case is quantitatively described by the so-called Luttinger liquid theory. The cleanest real-world realizations of this model are found in low-dimensional spin systems, such as in Heisenberg spin chain and ladder materials.
In my talk I shall review the most recent results of magneto-thermodynamic and neutron scattering studies of Luttinger liquid properties of low dimensional quantum magnets under high magnetic fields. Time permitting, I will show how similar behavior is realized in the d=1 Ising material under appropriate conditions. |
| Date: | Wed, 11.03.2015 |
| Time: | 16:00 |
| Duration: | 45 min |
| Location: | Freihaus Seminarraum 138B, Turm C, 7. OG (rote Leitfarbe) |
| Contact: | Andrei Pimenov |
| On asymptotic properties of vacuum solutions of the Einstein equations with positive cosmological constant |
| Speaker: | Tim Paetz (Vienna) |
| Abstract: | im Rahmen des Seminars in Geometric Analysis and Physics
(GAP Seminar) |
| Date: | Thu, 12.03.2015 |
| Time: | 11:00 |
| Duration: | 60 min |
| Location: | Arbeitsgruppe Gravitation, Währinger Strasse 17, Seminarraum Kernphysik, 5. Stock, Zi. 504-506, 1090 Wien |
| Contact: | M. Bauer (Fak. Math, U.V.), V. Branding (Fak. Math, T.U.), D. Fajman (Fak. Phys, U.V.), J. Joudioux (Fak. Phys, U.V.) |
| New physics, observables, and quantum field theory |
| Speaker: | Axel Maas (Axel Maas) |
| Abstract: | The definition of an observable in quantum field theory is an intricate question. This becomes most apparent in the Higgs sector of the standard model: From a field theoretical perspective, neither the W and Z nor the Higgs should be observable particles. Nonetheless, they seem to be. This apparent paradox can be resolved using field theory, and this resolution is confirmed by numerical simulations and is consistent with experimental observations. However, this resolution works because of very special properties of the standard model. It may not apply to new physics scenarios. This has implications for experimental signatures, and the viability of models. |
| Date: | Fri, 13.03.2015 |
| Time: | 10:30 |
| Duration: | 60 min |
| Location: | Seminar Room, Wohllebengasse 12-14 (Academy building), ground floor |
| Contact: | Josef Pradler |
| Wilson lines in Higher Spin Holography |
| Speaker: | Alejandra Castro (University of Amsterdam) |
| Abstract: | In recent years there has been a renewed interest in higher spin gravity. These theories have the potential to be the simplest models of AdS/CFT, and hence can provide insight to the fundamental mechanics behind holography. In this talk I'll overview recent progress on non-perturbative aspects of these theories with particular emphasis on Wilson lines and their relation to holographic entanglement entropy. |
| Date: | Fri, 13.03.2015 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | SEM 136, TU Wien, Freihaus, 10th floor (Wiedner Hauptstr. 8-10, A-1040 Vienna) |
| Contact: | Wout Merbis |
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