CPT

Calendar of Physics Talks Vienna

Atoms entangled forever
Speaker:Eugene Polzik (Niels Bohr Institute, Copenhagen)
Abstract:The talk will review precision quantum engineering of macroscopic atomic ensembles via a quantum interface of atoms with light. Key operations, such as generation of entangled states of atoms and light, quantum non-demolition measurements, and swapping of quantum states between photons and atoms will be reviewed. I will focus on the most recent development ? atomic entanglement which has been continuously maintained for up to one hour. This steady state entanglement is generated via an engineered dissipation and continuous measurement. Applications range from quantum teleportation of light onto atoms, to quantum memory for light, to magnetometry with record sensitivity, and to atom clocks.
Date: Mon, 04.04.2011
Time: 17:30
Duration: 60 min
Location:Atominstitut, großer Hörsaal, Stadionallee 2, 1020 Wien
Contact:Dr. Christiane Losert

Ein algebraisches Jost-Schroer Theorem für massive Quantenfelder (nach Jens Mund)
Speaker:Sabina Alazzawi (Wien)
Abstract:im Rahmen des Seminars für Mathematische Physik
Date: Tue, 05.04.2011
Time: 14:15
Duration: 60 min
Location:Fakultät für Physik, Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock
Contact:J. Yngvason

Self-assembly of transition metal rings on single layer h-BN/Rh(111)
Speaker:Fabian Natterer (EPFL Lausanne)
Abstract:Upon deposition of per mill amounts of cobalt (iron) on hexagonal (h) boron nitride at low temperature, we observe the formation of nanostructures lying like a necklace around the circular part of the (12 x 12) h-BN/Rh(111) moiré unit cell. These atomic chains, bent to a closed ring of 2 nm diameter, contain at least four and up to 12 equidistant Co (Fe) atoms. Differences in work function between wire and hole region result in an electric field that is trapping adatoms [1]. Low temperature scanning tunnelling microscopy results indicate short range repulsion between the ring atoms. The rings are metastable as interactions with the electric field of the tunnelling tip or gentle annealing may transform the ring into a compact Co cluster. Surprisingly, this process is reversible for Co where we observe that compact clusters get converted into rings by annealing. At low Co (Fe) coverage, the rings are several tens of (12 x 12) unit cells apart, implying large Co (Fe) adatom diffusion rates down to the lowest studied deposition temperatures of 10 K. [1] Dil et al. Science 319, 1824 (2008)
Date: Tue, 05.04.2011
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:Dr. Florian Mittendorfer

Tribimaximal mixing from small groups
Speaker:Akin Wingerter (LPSC Grenoble)
Abstract:im Rahmen des Teilchenphysikseminars
Date: Thu, 07.04.2011
Time: 14:15
Duration: 60 min
Location:Fakultät für Physik, Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock, 1090 Wien
Contact:W. Grimus, H. Neufeld

Towards the BKL conjecture - a step by Reiterer and Trubowitz
Speaker:Juliette Hell (Berlin)
Abstract:im Rahmen des Literaturseminars
Date: Thu, 07.04.2011
Time: 14:15
Duration: 60 min
Location:Fakultät für Physik, Arbeitsgruppe: Gravitation, Währinger Strasse 17, Seminarraum A, 2. Stock
Contact:P. T. Chrusciel, J.M. Heinzle

Airborne Matter Wave Inertial Sensing
Speaker:Remi GEIGER (Institut d'Optique, Paris)
Date: Fri, 08.04.2011
Time: 15:30
Location:TU Wien Atominstitut, Hörsaal, Stadionallee 2, 1020 Wien
Contact:J. Schmiedmayer