Sub-Doppler laser cooling of fermionic 40K atoms

Year: 1999

Authors: Modugno G., Benko C., Hannaford P., Roati G., Inguscio M.

Autors Affiliation: Univ Florence, European Lab Non Linear Spect, LENS, INFM, I-50125 Florence, Italy; Univ Pecs, H-7624 Pecs, Hungary; CSIRO, Clayton, Vic 3168, Australia; Univ Milan, Dipartimento Fis, I-20100 Milan, Italy; Univ Florence, Dipartimento Fis, I-50125 Florence, Italy.

Abstract: We report laser cooling of fermionic K-40 atoms, with temperatures down to (15+/-5) mu K, for an enriched sample trapped in a magneto-optical trap and additionaly cooled in optical molasses. This temperature is a factor of 10 below the Doppler-cooling limit acid corresponds to an rms velocity within a factor of 2 of the lowest realizable rms velocity (similar to 3.5v(rec)) in three-dimensional optical molasses. Realization of such low atom temperatures, up to now only accessible with evaporative cooling techniques, is an important precursor to producing a degenerate Fermi gas of K-40 atoms. [S1050-2947(99)50811-1].

Journal/Review: PHYSICAL REVIEW A

Volume: 60 (5)      Pages from: R3373  to: R3376

KeyWords: Bose-einstein Condensation; Gas; Vapor
DOI: 10.1103/PhysRevA.60.R3373

Citations: 19
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