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Calendar of Physics Talks Vienna
| Superconductivity and antiferromagnetic correlations in Fe-based superconductors |
| Speaker: | Prof. Vladimir Tsurkan (Universität Augsburg) |
| Abstract: | In the first part of the talk a general introduction into the physical phenomena in several groups of novel Fe-based pnictide and chalgogenide superconductors will be given. The peculiarities of their crystal structure, magnetic and charge transport will be described.
The second part will be devoted to Rb-intercalated FeSe compounds. These compounds show fascinating coexistence of superconductivity and antiferromagnetic order. The details of growth of the single crystals will be described with relation to flux and Bridgman methods. The results of the structural and compositional characterization, SQUID, conductivity, and specific heat studies will be presented and discussed within the constructed phase diagramm of the Rb-Fe-Se system, which includes several phases with different magnetic and conductivity behavior.
Particular attention in the talk will be given to phase separation phenomena which provide an explanation for the coexistence of superconductivity and static antiferromagnetic order. The recent results of neutron scattering, Mössbauer spectroscopy, muon spin rotation, and nuclear magnetic resonance investigations which support the scenario of the phase separation in Rb0.8Fe1.6Se2 will be presented.
In the last part of the talk the new approach for Li-intercalation in FeSe which allowed to enhance the critical temperature up to 45 K will be discussed.
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| Date: | Mon, 26.11.2012 |
| Time: | 17:00 |
| Duration: | 45 min |
| Location: | Vortmann Lecture Hall (Getreidemarkt 9) |
| Contact: | Andrei Pimenov |
| Polariton condensation in photonic circuits : propagation and optical manipulation |
| Speaker: | Jacqueline Bloch (LPN/CNRS) |
| Abstract: | Cavity polaritons have appeared lately as a fascinating system to investigate the physics of weakly interacting bosons. They are mixed exciton-photon quasi-particles arising from the strong coupling regime between excitons confined in quantum wells and photons confined in an optical microcavity. They are interesting, not only from a fundamental point of view, but also because they can be generated and manipulated in microstructured resonators, a first step toward polaritonic circuits. After a general introduction to cavity polaritons, recent experiments performed on low dimensional cavities will be reviewed. I will first describe polariton condensation in 1D cavities. Condensates propagating over macroscopic distances are generated, while preserving their spatial coherence [1]. They can be optically manipulated, spatially trapped or re-amplified along their propagation. The key role of |
| Date: | Mon, 26.11.2012 |
| Time: | 17:30 |
| Duration: | 60 min |
| Location: | Univ. of Vienna, Ernst-Mach Hörsaal, Boltzmanngasse 5, 2nd floor, 1090 Wien |
| Contact: | Dr. Christiane Losert / Univ. of Vienna |
| Challenges in Numerical Simulations of Astrophysical Flows |
| Speaker: | Hannes Grimm-Strele (Uni Wien) |
| Abstract: | Abstract: Recent progress in multi-dimensional modelling of stars shows that the traditional one-dimensional approach is not sufficient to properly describe the structure of the star. Due to the wide range of length and time scales involved and the mixed hyperbolic-parabolic character of the governing equations these simulations are very difficult and expensive to carry out. Insufficient resolution gives qualitatively wrong results and numerical schemes of low order are not efficient. Boundary conditions have a large influence on the solution and must be designed suitably. Finally, the numerical grid must stay simple (i.e., structured) such that high-order methods are applicable, but must also offer some flexibility to cover more complicated domains. The simulation code ANTARES which is developed at the Faculty of Mathematics of the University of Vienna is designed to face these problems |
| Date: | Tue, 27.11.2012 |
| Time: | 12:15 |
| Duration: | 60 min |
| Location: | Freihaus TU Wien, Wiedner Hauptstr. 8-10, Sem E136 |
| Contact: | stetina@hep.itp.tuwien.ac.at |
| Ion-induced patterns on crystalline Ge(100) and Ge(111) |
| Speaker: | Dr. Stefan Facsko (Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Dresden/Germany) |
| Abstract: | Low energy ion irradiations of surfaces can induce the formation of patterns with periodicities in the range of tens to hundreds of nanometers. At off-normal angle of incidence between 50° and 70° to the surface normal ripple patterns oriented perpendicular to the ion beam direction are observed. At normal incidence or for incidence angles smaller than 50° smoothing dominates on elemental materials, like Si and Ge. However, in contrast to irradiations at room temperature we found pattern formation on Ge surafces even at normal ion incidence for irradiations at temperatures above 530 K. Depending on the surface orientation checkerboard or isotropic hole patterns with the symmetry of the patterns reflecting the crystal structure of the irradiated surface are observed (Fig. 1). |
| Date: | Tue, 27.11.2012 |
| 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. Friedrich Aumayr |
| Non-linear stability of the Einstein-Vlasov system in 2+1 dimensions |
| Speaker: | David Fajman (AEI Golm) |
| Abstract: | joint seminar with the Pauli Institute GPRS Workshop |
| Date: | Wed, 28.11.2012 |
| Time: | 16:00 |
| Duration: | 60 min |
| Location: | Wolfgang Pauli Institut, Seminarraum C715, Nordbergstrasse 15/7/C, 1090 Wien |
| Contact: | P. Chrusciel |
| keV Neutrino Model Building |
| Speaker: | Alexander Merle (Univ. of Southampton) |
| Abstract: | im Rahmen des Teilchenphysikseminars |
| Date: | Thu, 29.11.2012 |
| Time: | 14:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | P. Ludl, H. Neufeld |
| Speaker: | Paolo Natoli (Ferrara) |
| Abstract: | 9th Vienna Central European Seminar on Particle Physics and Quantum Field Theory |
| Date: | Fri, 30.11.2012 |
| Time: | 09:10 |
| Duration: | 45 min |
| Location: | Fakultät für Physik, Christian Doppler-Hörsaal, 3. Stock, Strudlhofgasse 4, 1090 Wien |
| Contact: | H. Hüffel |
| Die wundersame Welt von Quantenflüssigkeiten aus Quarks und Gluonen: Resultate von ALICE am LHC |
| Speaker: | Johanna STACHEL (Physikalisches Institut der Universität Heidelberg, Deutschland) |
| Abstract: | Die Theorie der starken Wechselwirkung, die Quanten-Chromo-Dynamik sagt bei hoher Temperatur und Dichte einen neuen Materiezustand voraus, in dem das Confinement von Quarks und Gluonen aufgehoben ist. Dieser Zustand, das Quark-Gluon Plasma (QGP), hat im frühen Universum bis zu einem Alter von etwa 10 Millisekunden existiert. Seit etwas über 20 Jahren werden Experimente an Beschleunigern durchgeführt, um diesen Zustand wenigstens kurzzeitig wiederherzustellen. Das ideale Werkzeug dazu sind Kollisionen möglichst schwerer Atomkerne bei so hohen Energien wie möglich. Das war zuerst mit stationären Targets am Brookhaven AGS und am CERN SPS möglich und im Jahr 2000 war genügend Evidenz für diesen neuen Materiezustand
zusammengetragen. Durch den Start eines dedizierten Colliders, RHIC in Brookhaven, der im Sommer 2000 den Betrieb aufnahm, ist die Evidenz konsolidiert und es wurden erste Eigenschaften des QGP bestimmt.
Im November/Dezember 2010 wurden die ersten Kollisionen von Blei-Kernen am LHC im CERN untersucht, gefolgt von einer zweiten Messkampagne Ende 2011. Dieser Vortrag wird eine Auswahl von wichtigen Ergebnissen des ALICE Experiments dazu vorstellen und in den Kontext der Ergebnisse von RHIC und der theoretischen Interpretation setzen. Diese heissesten untersuchten Systeme zeigen in gewissen Aspekten dramatische Ähnlichkeit mit dem Verhalten der kältesten Systeme, die man im Labor herstellen und untersuchen kann, den kalten Quantengasen. |
| Date: | Fri, 30.11.2012 |
| Time: | 10:00 |
| Duration: | 90 min |
| Location: | Fakultät für Physik, Ludwig-Boltzmann-Hörsaal, Strudlhofgasse 4, Erdgeschoss |
| Contact: | Anton Zeilinger |
| Constraining Cosmic Acceleration |
| Speaker: | Jochen Weller (Munich) |
| Abstract: | 9th Vienna Central European Seminar on Particle Physics and Quantum Field
Theory |
| Date: | Fri, 30.11.2012 |
| Time: | 10:00 |
| Duration: | 45 min |
| Location: | Fakultät für Physik, Christian Doppler-Hörsaal, 3. Stock, Strudlhofgasse 4, 1090 Wien |
| Contact: | H. Hüffel |
| Newtonian versus Relativistic Cosmology |
| Speaker: | Dominik Schwarz (Bielefeld) |
| Abstract: | 9th Vienna Central European Seminar on Particle Physics and Quantum Field
Theory |
| Date: | Fri, 30.11.2012 |
| Time: | 11:20 |
| Duration: | 20 min |
| Location: | Fakultät für Physik, Christian Doppler-Hörsaal, 3. Stock, Strudlhofgasse 4, 1090 Wien |
| Contact: | H. Hüffel |
| Rare events underground: Dark Matter interpretation and new physics opportunities |
| Speaker: | Josef Pradler (Perimeter Institute) |
| Abstract: | 9th Vienna Central European Seminar on Particle Physics and Quantum Field
Theory |
| Date: | Fri, 30.11.2012 |
| Time: | 11:45 |
| Duration: | 45 min |
| Location: | Fakultät für Physik, Christian Doppler-Hörsaal, 3. Stock, Strudlhofgasse 4, 1090 Wien |
| Contact: | H. Hüffel |
| Cosmological Structure of Warm Dark Matter |
| Speaker: | Katarina Markovic (Munich) |
| Abstract: | 9th Vienna Central European Seminar on Particle Physics and Quantum Field
Theory |
| Date: | Fri, 30.11.2012 |
| Time: | 12:35 |
| Duration: | 20 min |
| Location: | Fakultät für Physik, Christian Doppler-Hörsaal, 3. Stock, Strudlhofgasse 4, 1090 Wien |
| Contact: | H. Neufeld |
| Speaker: | Andrea Campoleoni (Brussels) |
| Abstract: | 9th Vienna Central European Seminar on Particle Physics and Quantum Field
Theory |
| Date: | Fri, 30.11.2012 |
| Time: | 14:15 |
| Duration: | 50 min |
| Location: | Fakultät für Physik, Christian Doppler-Hörsaal, 3. Stock, Strudlhofgasse 4, 1090 Wien |
| Contact: | H. Hüffel |
| Unitary, information, black holes and fuzzballs |
| Speaker: | Andrea Puhm (Gif-sur-Yvette) |
| Abstract: | 9th Vienna Central European Seminar on Particle Physics and Quantum Field
Theory |
| Date: | Fri, 30.11.2012 |
| Time: | 15:10 |
| Duration: | 20 min |
| Location: | Fakultät für Physik, Christian Doppler-Hörsaal, 3. Stock, Strudlhofgasse 4, 1090 Wien |
| Contact: | H. Hüffel |
| Holography and the Gravitational S-Matrix |
| Speaker: | Michael Gary (Vienna) |
| Abstract: | 9th Vienna Central European Seminar on Particle Physics and Quantum Field
Theory |
| Date: | Fri, 30.11.2012 |
| Time: | 15:35 |
| Duration: | 20 min |
| Location: | Fakultät für Physik, Christian Doppler-Hörsaal, 3. Stock, Strudlhofgasse 4, 1090 Wien |
| Contact: | H. Hüffel |
| Black holes and the von der Waals equation of state |
| Speaker: | Brian Dolan (Maynooth) |
| Abstract: | 9th Vienna Central European Seminar on Particle Physics and Quantum Field
Theory |
| Date: | Fri, 30.11.2012 |
| Time: | 16:20 |
| Duration: | 20 min |
| Location: | Fakultät für Physik, Christian Doppler-Hörsaal, 3. Stock, Strudlhofgasse 4, 1090 Wien |
| Contact: | H. Hüffel |
| Dark Energy Time Variation and Progenitor Evolution from CLASH HST Supernovae Ia |
| Speaker: | Enikö Regös (Budapest) |
| Abstract: | 9th Vienna Central European Seminar on Particle Physics and Quantum Field
Theory |
| Date: | Fri, 30.11.2012 |
| Time: | 16:45 |
| Duration: | 20 min |
| Location: | Fakultät für Physik, Christian Doppler-Hörsaal, 3. Stock, Strudlhofgasse 4, 1090 Wien |
| Contact: | H. Hüffel |
| DARK ENERGY, DARK MATTER AND BLACK HOLES, AS ESSENTIAL INGREDIENTS OF A NEW CYCLIC THEORY OF THE UNIVERSE |
| Speaker: | Sir Roger Penrose (Mathematical Institute, Univ. of Oxford) |
| Abstract: | 9th Vienna Central European Seminar on Particle Physics and Quantum field Theory |
| Date: | Fri, 30.11.2012 |
| Time: | 19:00 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Lise Meitner-Hörsaal, Strudlhofgasse 4, 1. Stock, 1090 Wien |
| Contact: | H. Hüffel |
| The quantum geometric limit |
| Speaker: | Seth Lloyd (MIT) |
| Abstract: | 9th Vienna Central European Seminar on Particle Physics and Quantum Field
Theory |
| Date: | Sat, 01.12.2012 |
| Time: | 09:00 |
| Duration: | 45 min |
| Location: | Fakultät für Physik, Christian Doppler-Hörsaal, 3. Stock, Strudlhofgasse 4, 1090 Wien |
| Contact: | H. Hüffel |
| Moving cavities and detectors for relativistic quantum information processing |
| Speaker: | Ivete Fuentes (Nottingham) |
| Abstract: | 9th Vienna Central European Seminar on Particle Physics and Quantum Field
Theory |
| Date: | Sat, 01.12.2012 |
| Time: | 09:50 |
| Duration: | 45 min |
| Location: | Fakultät für Physik, Christian Doppler-Hörsaal, 3. Stock, Strudlhofgasse 4, 1090 Wien |
| Contact: | H. Hüffel |
| Relaxation and Prethermalization in an Isolated Quantum System |
| Speaker: | Tim Langen (Vienna) |
| Abstract: | 9th Vienna Central European Seminar on Particle Physics and Quantum Field
Theory |
| Date: | Sat, 01.12.2012 |
| Time: | 11:10 |
| Duration: | 20 min |
| Location: | Fakultät für Physik, Christian Doppler-Hörsaal, 3. Stock, Strudlhofgasse 4, 1090 Wien |
| Contact: | H. Hüffel |
| Towards relativistic quantum technologies |
| Speaker: | David Edward Bruschi (Leeds) |
| Abstract: | 9th Vienna Central European Seminar on Particle Physics and Quantum Field
Theory |
| Date: | Sat, 01.12.2012 |
| Time: | 11:35 |
| Duration: | 20 min |
| Location: | Fakultät für Physik, Christian Doppler-Hörsaal, 3. Stock, Strudlhofgasse 4, 1090 Wien |
| Contact: | H. Hüffel |
| Quantum mechanics versus local reality: fields and atoms |
| Speaker: | Margaret Reid (Melbourne) |
| Abstract: | 9th Vienna Central European Seminar on Particle Physics and Quantum Field Theory |
| Date: | Sat, 01.12.2012 |
| Time: | 12:00 |
| Duration: | 45 min |
| Location: | Fakultät für Physik, Christian Doppler-Hörsaal, 3. Stock, Strudlhofgasse 4, 1090 Wien |
| Contact: | H. Hüffel |
| Testing Foundational Issues of Quantum Mechanics at Accelerator Facilities |
| Speaker: | Beatrix Hiesmayr (Brno) |
| Abstract: | 9th Vienna Central European Seminar on Particle Physics and Quantum Field
Theory |
| Date: | Sat, 01.12.2012 |
| Time: | 14:15 |
| Duration: | 45 min |
| Location: | Fakultät für Physik, Christian Doppler-Hörsaal, 3. Stock, Strudlhofgasse 4, 1090 Wien |
| Contact: | H. Hüffel |
| Hunting for CPT symmetry and Quantum Mechanics violations in neutral meson systems |
| Speaker: | Antonio Di Domenico (Rome) |
| Abstract: | 9th Vienna Central European Seminar on Particle Physics and Qzantum Field
Theory |
| Date: | Sat, 01.12.2012 |
| Time: | 15:05 |
| Duration: | 45 min |
| Location: | Fakultät für Physik, Christian Doppler-Hörsaal, 3. Stock, Strudlhofgasse 4, 1090 Wien |
| Contact: | H. Hüffel |
| Entanglement Generation in Relativistic Quantum Fields |
| Speaker: | Nicolai Friis (Nottingham) |
| Abstract: | 9th Vienna Central European Seminar on Particle Physics and Quantum Field
Theory |
| Date: | Sat, 01.12.2012 |
| Time: | 16:25 |
| Duration: | 20 min |
| Location: | Fakultät für Physik, Christian Doppler-Hörsaal, 3. Stock, Strudlhofgasse 4, 1090 Wien |
| Contact: | H. Hüffel |
| CPT in the Early Universe and the Observed Baryon Asymmetry |
| Speaker: | Nick E. Mavromatos (London) |
| Abstract: | 9th Vienna Central European Seminar on Particle Physics and Quantum Field
Theory |
| Date: | Sat, 01.12.2012 |
| Time: | 16:50 |
| Duration: | 45 min |
| Location: | Fakultät für Physik, Christian Doppler-Hörsaal, 3. Stock, Strudlhofgasse 4, 1090 Wien |
| Contact: | H. Hüffel |
| Speaker: | Hartmut Abele (Vienna) |
| Abstract: | 9th Vienna Central European Seminar on Particle Physics and Quantum Field
Theory |
| Date: | Sat, 01.12.2012 |
| Time: | 17:40 |
| Duration: | 50 min |
| Location: | Fakultät für Physik, Christian Doppler-Hörsaal, 3. Stock, Strudlhofgasse 4, 1090 Wien |
| Contact: | H. Hüffel |
| Quantum Gravity and the Very Early Universe |
| Speaker: | Abhay Ashtekar (Penn State) |
| Abstract: | 9th Vienna Central European Seminar on Particle Physics and Quantum Field
Theory |
| Date: | Sun, 02.12.2012 |
| Time: | 09:00 |
| Duration: | 45 min |
| Location: | Fakultät für Physik, Christian Doppler-Hörsaal, 3. Stock, Strudlhofgasse 4, 1090 Wien |
| Contact: | H. Hüffel |
| Speaker: | Timothy Clifton (London) |
| Abstract: | 9th Vienna Central European Seminar on Particle Physics and Quantum Field
Theory |
| Date: | Sun, 02.12.2012 |
| Time: | 09:50 |
| Duration: | 45 min |
| Location: | Fakultät für Physik, Christian Doppler-Hörsaal, 3. Stock, Strudlhofgasse 4, 1090 Wien |
| Contact: | H. Hüffel |
| Probing fundamental physics on graphene: Weyl symmetry, Beltrami pseudosphere and the Hawking effect |
| Speaker: | Alfredo Iorio (Praha) |
| Abstract: | 9th Vienna Central European Seminar on Particle Physics and Quantum Field
Theory |
| Date: | Sun, 02.12.2012 |
| Time: | 11:10 |
| Duration: | 20 min |
| Location: | Fakultät für Physik, Christian Doppler-Hörsaal, 3. Stock, Strudlhofgasse 4, 1090 Wien |
| Contact: | H. Hüffel |
| Trapped surfaces in a hadronic fluid |
| Speaker: | Dijana Tolic (Zagreb) |
| Abstract: | 9th Vienna Central European Seminar on Particle Physics and Quantum Field
Theory |
| Date: | Sun, 02.12.2012 |
| Time: | 11:35 |
| Duration: | 20 min |
| Location: | Fakultät für Physik, Christian Doppler-Hörsaal, 3. Stock, Strudlhofgasse 4, 1090 Wien |
| Contact: | H. Hüffel |
| Renormalization group scale-setting in astrophysical systems |
| Speaker: | Silvije Domazet (Zagreb) |
| Abstract: | 9th Vienna Central European Seminar on Particle Physics and Quantum Field
Theory |
| Date: | Sun, 02.12.2012 |
| Time: | 12:00 |
| Duration: | 20 min |
| Location: | Fakultät für Physik, Christian Doppler-Hörsaal, 3. Stock, Strudlhofgasse 4, 1090 Wien |
| Contact: | H. Hüffel |
| Primordial perturbation spectra in Renormalisation Group driven cosmology |
| Speaker: | Adriano Contillo (Mainz) |
| Abstract: | 9th Vienna Central European Seminar on Particle Physice and Quantum Field
Theorie |
| Date: | Sun, 02.12.2012 |
| Time: | 12:25 |
| Duration: | 20 min |
| Location: | Fakultät für Physik, Christian Doppler-Hörsaal, 3. Stock, Strudlhofgasse 4, 1090 Wien |
| Contact: | H. Hüffel |
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