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BEC in Old Heidelberg

schmiedmayer graph

[Historical report created from GSU BEC Homepage:]

"On the 13th of May we have successfully achieved Bose Einstein condensation of 87Rb in a magnetic Z-trap. We trap the |F = 2, MF = 2> magnetic substate in a Ioffe Pritchard type magnetic microtrap (the Z-trap). We start our evaporative cooling cycle with ~ 108 atoms and find ~ 3 x 105 atoms in the condensate. The magnetic trap frequencies are: Transversal: 2π x 600 Hz, Longitudinal: 2π x 60Hz . The picture above shows how the condensate emerges from the thermal background as we decrease the temperature.

Comment to the picture below of the chip mounting: The monolithic wire structure (Z), which supplies partially the magnetic field for the Ioffe trap is below the gold surface. The gold surface is actually a set of additional smaller micro traps, also called "AtomChip".

Members of the group:

  • Alexander Kasper
  • Stephan Schneider
  • Christoph vom Hagen
  • Louw Feenstra
  • Joerg Schmiedmayer

We also acknowledge help from: 

  • Markus Bartenstein
  • Thorsten Schumm
  • Bastian Engeser

For further information, see"

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