Species-selective microwave cooling of a mixture of rubidium and caesium atoms

Details Species-selective microwave cooling of a mixture of rubidium and caesium atoms Species-selective microwave cooling of a mixture of rubidium and caesium atoms

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007njph....9..147h&link_type=abstract

New Journal of Physics, Volume 9, Issue 5, pp. 147 (2007).

Physics

12

Scientific paper

We have sympathetically cooled a small sample of 133Cs atoms with 87Rb to below 1 μK. Evaporative cooling was realized with microwave radiation driving the Rb ground-state hyperfine transition. By analysing the sympathetic cooling dynamics, we derive a lower limit of the modulus of the Rb Cs interspecies triplet s-wave scattering length of 200 a0. For temperatures below 5 μK we observe strong non-exponential losses of the Cs sample in the presence of the Rb sample.

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