https://doi.org/10.1140/epjd/e2003-00297-y
Prospect for BEC in a cesium gas: one-dimensional evaporative cooling in a hybrid magnetic and optical trap
Laboratoire Aimé Cotton (Laboratoire Aimé Cotton is associated with University of Paris-Sud.) , CNRS II, Bâtiment 505, Campus d'Orsay, 91405 Orsay, France
Corresponding authors: a samuel.guibal@lac.u-psud.fr - b pierre.pillet@lac.u-psud.fr
Received:
13
September
2002
Revised:
25
July
2003
Published online:
2
December
2003
Bose-Einstein condensation (BEC) in a atomic cesium gas prepared in a
“low field seeker” Zeeman sublevel and
confined in a magnetic trap has been thwarted by a high cross-section of
inelastic spin-flip collisions. A recent experiment [1]
succeeded in reaching BEC for cesium atoms using all optical methods and
tuning the scattering length. We will discuss a hybrid magnetic and optical
trap for cesium atoms in the true hyperfine ground state, the
“high field seeker” Zeeman sublevel, . Although this trap allows only one-dimensional (1D) evaporative
cooling, we show that a route towards BEC with such a trap should be
possible. We present simulations of 1D evaporative cooling, which shows that
a high phase space density (PSD) of 0.1 could be reached in less than 10
seconds.
PACS: 03.75.Hh – Static properties of condensates; thermodynamical, statistical and structural properties / 05.30.Jp – Boson systems / 32.80.Pj – Optical cooling of atoms; trapping
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2004