Direct Laser Cooling to Bose-Einstein Condensation in a Dipole Trap
Name
PhysRevLett.122.203202.pdf
Description
Published version
Size
483.44 KB
Format
Adobe PDF
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Author(s)
Urvoy, Alban
Vendeiro, Zachary
Ramette, Joshua
Adiyatullin, Albert
Vuletić, Vladan
Date Issued
2019
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Version
Final published version
Abstract
© 2019 American Physical Society. We present a method for producing three-dimensional Bose-Einstein condensates using only laser cooling. The phase transition to condensation is crossed with 2.5×104 Rb87 atoms at a temperature of Tc=0.6 μK after 1.4 s of cooling. Atoms are trapped in a crossed optical dipole trap and cooled using Raman cooling with far-off-resonant optical pumping light to reduce atom loss and heating. The achieved temperatures are well below the effective recoil temperature. We find that during the final cooling stage at atomic densities above 1014 cm-3, careful tuning of trap depth and optical-pumping rate is necessary to evade heating and loss mechanisms. The method may enable the fast production of quantum degenerate gases in a variety of systems including fermions.
MIT Department
Massachusetts Institute of Technology. Department of Physics
MIT-Harvard Center for Ultracold Atoms
Massachusetts Institute of Technology. Research Laboratory of Electronics
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DOI of Published Version
https://doi.org/10.1103/PHYSREVLETT.122.203202
