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Calendar of Physics Talks Vienna
| Algebraic conformal field theory |
| Speaker: | Jochen Zahn (Univ. Wien) |
| Abstract: | im Rahmen des Seminars für Mathematische Physik |
| Date: | Tue, 13.05.2014 |
| Time: | 14:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | J. Yngvason, J. Schlemmer |
| Creating obstacle courses for raft proteins – How micropatterning can help decipher plasma membrane organization |
| Speaker: | Dr. Eva Sevcsik (Technische Universität Wien, Institut für Angewandte Physik) |
| Abstract: | According to the prevailing theory, sterol- and sphingolipid enriched nanodomains exist in the mammalian plasma membrane but are too small and dynamic to allow for proper characterization. Attempts to artificially enhance putative tendencies in the plasma membrane to create optically resolvable phase separation have yielded new model systems like Giant Plasma Membrane Vesicles, bridging the gap between synthetic lipid bilayers and live cell membranes.
In this work, we take those approaches one step further and attempt to create large scale phase separation in a live cell situation. To this end, we use a micropatterning technique to artificially create regions in the PM of live cells where we use a model raft protein glycosylphosphatidylinositol (GPI-GFP) is immobilized and highly enriched (via surface-immobilzed antibodies) at different densities to monitor the effects on plasma membrane |
| Date: | Tue, 13.05.2014 |
| 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: | Univ.Prof. Dr. Gerhard Schütz |
| Light quark physics and lattice QCD |
| Speaker: | Vittorio Lubicz (Univ. di Roma 3) |
| Abstract: | im Rahmen des Teilchenphysikseminars |
| Date: | Tue, 13.05.2014 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | A. Hoang, V. Mateu |
| On the definition of mass and center of mass of isolated systems in Newtonian gravity and general relativity |
| Speaker: | Carla Cederbaum (Universität Tübingen) |
| Abstract: | Isolated gravitating systems such as stars, black holes or galaxies play an
important role both in Newton's theory of gravity(NG)
and in general relativity (GR). While the definition of mass and center of mass via
the mass density is straightforward in NG, GR knows several
promising approaches. The most important definitions of center of mass in GR go back
to Beig and O Murchadha/Arnowitt, Deser and Misner
(BM/ADM) as well as to Huisken and Yau (HY). Under certain assumptions on the
asymptotic decay, the BM/ADM and the HY centers coincide (Huang,
Metzger-Eichmair, Nerz). However, both notions subtly depend on the chosen
asymptotic coordinates; in particular, we will
present an explicit example in which both centers diverge and a corresponding example in NG (C-Nerz). Moreover, we will relate the
Newtonian and the relativistic centers with the help of the Newtonian limit. |
| Date: | Thu, 15.05.2014 |
| Time: | 10:30 |
| Duration: | 60 min |
| Location: | Faculty of Mathematics, University of Vienna, Besprechungszimmer 3 (3rd floor) |
| Contact: | M. Bauer (UV), V. Branding (TU), A. Burtscher (UV), D. Fajman (UV), F. Genoud (UV), J. Joudioux (UV) |
| 4th post-Newtonian Hamiltonian dynamics of compact binary systems |
| Speaker: | Piotr Jaranowski (Bialystok) |
| Abstract: | im Rahmen des Literaturseminars für Gravitationsphysik |
| Date: | Thu, 15.05.2014 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | Arbeitsgruppe Gravitation, Währinger Strasse 17, Seminarraum A, 2. Stock, 1090 Wien |
| Contact: | P.T. Chrusciel |
| On the origin of statistical temperature in quantum universe |
| Speaker: | Vladimir BUŽEK (Research Center for Quantum Information, Slovak Academy of Sciences, Bratislava) |
| Abstract: | I will show that within a non-relativistic quantum-mechanical model of a Universe (the q-Universe) a concept of statistical temperature emerges as a consequence of quantum entanglement between constituents (sub-systems) of the q-Universe. In particular, I will model the q-Universe as a system of interacting spin-1/2 particles described by a specific Hamiltonian (e.g. the Ising model). The q-Universe is assumed to be in a pure state of its Hamiltonian. I will show that (almost) any sub-system of the q-Universe is in a mixed state described by a density operator such that probabilities of outcomes of measurements in the energy eigenbasis of the sub-system are described (can be very well approximated) by the Boltzmann distribution. |
| Date: | Fri, 16.05.2014 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | Atominstitut, Hörsaal, Stadionallee 2, 1020 Wien |
| Contact: | Jörg Schmiedmayer |
| Phase transitions in large networks |
| Speaker: | Elisabeth Traxler (Univ. Wien) |
| Abstract: | joint seminars series: „Analysis of Complex Systems“ (Med Uni Vienna)
„Complex Stochastic Systems“ (Uni Vienna) |
| Date: | Fri, 16.05.2014 |
| Time: | 14:15 |
| Duration: | 90 min |
| Location: | Medizinische Univ. Wien, Informatikbibliothek, CeMSIIS; Bauteil 88, E03, Spitalgasse 23 |
| Contact: | H. Hüffel und Stefan Thurner |
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