Michael Haas

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Michael Haas

Group members

Michael Haas

Last position
in our group:

PhD student

Field of research
in our group:

BEC

Publications(up to 2007)

M. Haas
Sympathetisches Kühlen in einer Rubidium-Cäsium-Mischung: Erzeugung ultrakalter Cäsiumatome, (2007), PhD thesisBibTeX

M. Haas, V. Leung, D. Frese, D. Haubrich, S. John, C. Weber, A. Rauschenbeutel and D. Meschede
Species-selective microwave cooling of a mixture of rubidium and caesium atoms, New J. Phys. 9, 147 (2007)BibTeX
ABSTRACT »
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 a_0. For temperatures below 5 μK we observe strong non-exponential losses of the Cs sample in the presence of the Rb sample.