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Calendar of Physics Talks Vienna
| Exploring Quantum Phenomena with Single Neutral Atoms |
| Speaker: | Artur Widera (Universität Bonn) |
| Abstract: | Neutral atom based quantum systems have seen great advances in preparation, manipulation and detection in recent years. Two complimentary approaches are pursued to study and control quantum phenomena in these systems: Experiments usually either start from single, individually controllable atoms, or they start from large many-body systems such as Bose-Einstein condensates.
In the first part of my talk I will outline the progress we have made to control and exploit single neutral atoms in order to explore quantum phenomena, such as the experimental realization of a single atom interferometer; the quantum walk on a line; or the interaction of single atoms with single photons in a high-finesse optical resonator allowing us to perform a quantum non-demolition measurement of the atom’s hyperfine state, for example.
In the second part of my talk I will present our approach to merge the two worlds of single atoms on the one hand and many-body systems on the other hand in order to combine their advantages. We have developed tools to immerse a single or few Cesium atoms into an ultracold Rubidium gas and study their interaction. We have observed cooling of the single atom down to the temperature of the many-body system through ground-state collisions, paving the way for, e.g., impurity physics in quantum gases.
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| Date: | Mon, 21.03.2011 |
| Time: | 17:30 |
| Duration: | 60 min |
| Location: | Atominstitut, großer Hörsaal, Stadionallee 2, 1020 Wien |
| Contact: | Dr. Christiane Losert / Prof. Arno Rauschenbeutel |
| Genuine Multipartite Entanglement in Dicke States |
| Speaker: | Paul Erker (University of Vienna) |
| Abstract: | Genuine multipartite entanglement has witnessed serious attention within the scientific community recently. It was found to play a role in
various fields, from solid state phase transitions to biological systems, and to be an important resource for e.g. quantum computation or
quantum secret sharing. Dicke states represent an important class of multipartite quantum states, which e.g. appear as ground states of
Hamiltoneans in various systems. Criteria to detect genuine multipartite entanglement in such states were recently developed and will be
presented. |
| Date: | Tue, 22.03.2011 |
| Time: | 12:30 |
| Duration: | 60 min |
| Location: | TU Wien (Wiedner Hauptstr. 8-10, yellow area, 10th floor, seminar room E136 ) |
| Contact: | Sabine Ertl |
| Deformationen von Quantenfeldtheorien auf der de Sitter Raumzeit |
| Speaker: | Eric Morfa-Morales (Univ. Wien) |
| Abstract: | im Rahmen des Seminars für Mathematische Physik |
| Date: | Tue, 22.03.2011 |
| Time: | 14:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | J. Yngvason |
| Decay constants of heavy mesons from QCD sum rules |
| Speaker: | Dmitri Melikhov (Univ. Wien) |
| Abstract: | im Rahmen des Teilchenphysikseminars |
| Date: | Thu, 24.03.2011 |
| Time: | 14:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | W. Lucha, H. Neufeld |
| Weakly regular spacetimes with symmetries. Definition, existence and global geometry |
| Speaker: | Philippe LeFloch (Paris) |
| Abstract: | im Rahmen des Literaturseminars |
| Date: | Thu, 24.03.2011 |
| Time: | 14:15 |
| Duration: | 60 min |
| Location: | Arbeitsgruppe: Gravitation, Währinger Strasse 17, Seminarraum A, 2. Stock |
| Contact: | P. T. Chrusciel |
| Disorder Scattering in Large-Scale Graphene Nanodevices |
| Speaker: | Florian LIBISCH (Institut für Theoretische Physik, TU Wien) |
| Date: | Fri, 25.03.2011 |
| Time: | 15:30 |
| Location: | TU Wien Atominstitut, Hörsaal, Stadionallee 2, 1020 Wien |
| Contact: | H. Abele |
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