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Quantum technologies

Dieter Meschede's research group
Home AMO physics colloquia
  • Tobias Salger

  • Invited speaker: Dr. Tobias Salger
    Affiliation: d-fine GmbH
    Title: Modern Risk Management
    Time and room: 10:15 lecture hall IAP

  • Bachelor and Master talks

  • 16:00 Jonathan Zopes: "Einzelplatzdetektion im optischen Gitter unterhalb des Beugungslimits"
    16:40 Thomas Gehrmann: "An Optical Stokes Polarimeter for Optimized Spin-dependent Transport of Atoms"
    17:40 Deena Kim: "Deterministic Atom Sorting in Optical Lattices"
    18:20 Christian Lützler: "Fabrication of Optical Microfibers"
    Room: lecture hall IAP

  • A. Femius Koenderink

  • Invited speaker: Prof. Dr. A. Femius Koenderink
    Affiliation: AMOLF, Amsterdam
    Title: Subwavelength Plasmonic And Magnetic Resonators To Control Photons And Emitters
    Time and room: 17:15  lecture hall IAP
    Abstract: Controlling how photons are emitted, absorbed and redirected on the nanoscale is of great interest for quantum information, microscopy and nanoscale light sources. Nanophotonics increasingly explores the solutions that electrical engineers use to control RF waves using broadband antennas, which are very different from traditional cavity QED approaches.

    We explore how plasmonic and metamaterial scatterers allow to transpose RF antenna concepts to optics and quantum optics. Our research unravels how a resonant response to the magnetic field of light, combined with plasmonic resonances, gives rise to nanoscatterers and sources with surprising properties, in terms of directionality, polarization, and chirality.

  • Cord Müller

  • Invited speaker: Prof. Dr. Cord Müller
    Affiliation: National University of Singapore
    Title: Hot Times For Cold Atoms In Random Potentials
    Time and room: 17:15  lecture hall IAP

  • Axel Pelster

  • Invited speaker: Prof. Dr. Axel Pelster
    Affiliation: TU Kaiserslautern
    Title: Dipolar Bose-Einstein Condensates With Weak Disorder
    Time and room: 17:15  lecture hall IAP
    Abstract: The talk discusses several illustrative examples where ultracold dilute atomic gases provide important insights into condensed matter physics. We start with reviewing the properties of Bose-Einstein condensates (BECs) with the anisotropic and long-range dipole-dipole interaction. To this end we investigate the influence of quantum fluctuations upon the equilibrium configuration, the low-lying oscillation frequencies, and the time-of-flight dynamics. We find that both atomic magnetic and molecular electric dipolar BECs offer promising scenarios for detecting beyond mean-field effects. Furthermore, we report on recent progress in understanding the properties of ultracold bosonic atoms in potentials with quenched disorder. This notoriously difficult dirty boson problem is experimentally relevant for the miniaturization of BECs on chips and can also be studied by tailoring disorder potentials via laser speckle fields. Theoretically it is intriguing because of the competition of localization and interaction as well as of disorder and superfluidity.
    Finally, we combine both previous topics and consider the impact of weak disorder upon a
    polarized dipolar BEC at zero temperature. Surprisingly we find that disorder corrections of the
    superfluid density yield characteristic interaction-induced anisotropies which are not present in
    the absence of disorder.