Collisions in a cesium hybrid optical and magnetic trap |
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Authors: | N?Hoang N?Zahzam Email author" target="_blank">S?GuibalEmail author P?Pillet |
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Institution: | (1) Laboratoire Aimé Cotton, CNRS, Batiment 505, Campus d'Orsay, 91405 Orsay, France;(2) Laboratoire Matériaux et Phénomènes Quantiques, UMR 7162, CNRS/Université Denis Diderot-Paris 7, Case 7021, 2 place Jussieu, 75251 Paris Cedex 05, France |
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Abstract: | A new scheme for trapping Cs atoms in a non dissipative trap has been developed. The trap involves both optical dipole forces
and magnetic forces. This device is suitable for Cs atoms in the lowest energy Zeeman sublevel, thus avoiding the two-body
inelastic collisions which prevented reaching Bose-Einstein condensation of Cs in purely magnetic traps. Furthermore, an additional
magnetic field can be applied, allowing a fine tuning of the two-body elastic collision cross-section. We report on the experimental
realization of such a trap and describe the characteristics of the trapped atomic sample. An analysis of the collisional regime
is performed using measurements of the damping of the oscillatory modes of the trapped atom cloud. |
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