HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Evaporative cooling of a small number of atoms in a single-beam microscopic dipole trap

Abstract : We demonstrate experimentally the evaporative cooling of a few hundred rubidium-87 atoms in a single-beam microscopic dipole trap. Starting with 800 atoms at a temperature of 125 μK, we produce an unpolarized sample of 40 atoms at 110 nK, within 3 s. The phase-space density at the end of the evaporation reaches unity, close to quantum degeneracy. The gain in phase-space density after evaporation is 10 3 . We find that the scaling laws used for much larger numbers of atoms are still valid despite the small number of atoms involved in the evaporative cooling process. We also compare our results to a simple kinetic model describing the evaporation process and find good agreement with the data.
Complete list of metadata

Cited literature [35 references]  Display  Hide  Download

Contributor : Yvan R. P. Sortais Connect in order to contact the contributor
Submitted on : Monday, January 12, 2015 - 10:14:19 AM
Last modification on : Wednesday, September 16, 2020 - 5:43:44 PM
Long-term archiving on: : Friday, September 11, 2015 - 6:33:31 AM


Publisher files allowed on an open archive




R Bourgain, J Pellegrino, A Fuhrmanek, Yvan R. P. Sortais, Antoine Browaeys. Evaporative cooling of a small number of atoms in a single-beam microscopic dipole trap. Physical Review A, American Physical Society, 2013, 88, pp.23428 / arXiv:1305.3802. ⟨10.1103/PhysRevA.88.023428⟩. ⟨hal-01102107⟩



Record views


Files downloads