Degenerate Raman sideband cooling of K<mml:mprescripts/><mml:none/>39

2017/03/15 by Michael Gröbner, Philipp Weinmann, Emil Kirilov +1 · 1 voice
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #Quantum optics and atomic interactions

paper · doi:10.1103/physreva.95.033412

openalex created_date 2017/02/17 · openalex publication_date 2017/03/15 · openalex updated_date 2026/07/28

Abstract

We report on a realization of sub-Doppler laser cooling of ³⁹K atoms using degenerate three-dimensional Raman sideband cooling. We take advantage of the well-resolved excited hyperfine states on the D₁ optical transition to produce spin-polarized samples with 1.4\ifmmode×\else\texttimes\fi10⁸ atoms at temperatures of 1.8 \ensuremathμK. The phase-space densities are \ensuremath≥10^\ensuremath-4, which significantly improves the initial conditions for a subsequent evaporative cooling step. The presented cooling technique using the D₁ line can be adapted to other atomic species and is applicable to high-resolution imaging schemes in far off-resonant optical lattices.

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