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Special K

Inguscio graph

[Historical report created from GSU BEC Homepage:]

"At LENS, in Firenze, on September 14th we have achieved Bose-Einstein condensation of 41K by means of sympathetic cooling with 87Rb.

Both species are precooled in a double MOT system and simultaneously loaded in a QUIC magnetic trap in their |F = 2, MF = 2> state. Selective evaporative cooling of Rb is performed using a microwave knife on the 6.8 GHz hyperfine transition, and sympathetic cooling of K is very efficient, due to a large interspecies collisional cross-section. We observe the formation of K condensates containing about 104 atoms at T ~ 160 nK.

Figure above: Sympathetic cooling of 41K atoms with 87Rb from a few tens of mK(right) to Bose-Einstein condensation for K (left).

Our team is composed of:

  • Gabriele Ferrari
  • Giovanni Modugno
  • Giacomo Roati
  • Massimo Inguscio

Fundamental contributions were made by:

  • Robert J. Brecha (University of Dayton, Dayton, Ohio)
  • Wlodek Jastrebski (Polish Academy of Science, Warsaw, Poland)
  • Nicola Poli
  • Francesco Riboli

For more details visit our web page."