Now showing items 1-4 of 4

    • Adsorbate electric fields on a cryogenic atom chip 

      Chan, K. S.; Siercke, M.; Hufnagel, C.; Dumke, Rainer Helmut (2014)
      We investigate the behavior of electric fields originating from adsorbates deposited on a cryogenic atom chip as it is cooled from room temperature to cryogenic temperature. Using Rydberg electromagnetically induced ...
    • All-optical generation and photoassociative probing of sodium Bose–Einstein condensates 

      Dumke, Rainer Helmut; Johanning, M.; Gomez, E.; Weinstein, J. D.; Jones, K. M.; Lett, P. D. (2006)
      We demonstrate an all-optical technique to evaporatively produce sodium Bose–Einstein condensates (BEC). We use a crossed-dipole trap formed from light near 1 μm, and a simple ramp of the intensity to force evaporation. ...
    • Density dependence of the ionization avalanche in ultracold Rydberg gases 

      Siercke, M.; Oon, F. E.; Mohan, A.; Wang, Z. W.; Lim, M. J.; Dumke, Rainer Helmut (2014)
      We report on the behavior of the ionization avalanche in an ensemble of ultracold 87Rb atoms coupled to a high-lying Rydberg state and investigate extensions to the current model by including the effects of three-body ...
    • Design of magnetic traps for neutral atoms with vortices in type-II superconducting microstructures 

      Zhang, B.; Fermani, R.; Müller, T.; Lim, M. J.; Dumke, Rainer Helmut (2010)
      We design magnetic traps for atoms based on the average magnetic field of vortices induced in a type-II superconducting thin film. This magnetic field is the critical ingredient of the demonstrated vortex-based atom traps, ...