Bulletin of the American Physical Society
54th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 68, Number 7
Monday–Friday, June 5–9, 2023; Spokane, Washington
Session S07: New Laser Cooling and Trapping Techniques
10:30 AM–12:18 PM,
Thursday, June 8, 2023
Room: 206 B
Chair: Toshi Shimasaki, UCSB
Abstract: S07.00004 : Atom-number enhancement by shielding in a strontium magneto-optical trap
11:06 AM–11:18 AM
Presenter:
Sandra Buob
(ICFO-The Institute of Photonic Sciences)
Authors:
Sandra Buob
(ICFO-The Institute of Photonic Sciences)
Jonatan Höschele
(ICFO-The Institute of Photonic Sciences)
Antonio Rubio-Abadal
(ICFO-The Institute of Photonic Sciences)
Vasiliy Makhalov
(ICFO-The Institute of Photonic Sciences)
Leticia Tarruell
(ICFO-The Institute of Photonic Sciences; ICREA)
The method consists in driving the narrow red intercombination line at 689nm (1S0 →3P1) on resonance during the blue MOT operated on the broad-linewidth transition 1S0 → 1P1 at 461nm. As a result, we populate a short-lived reservoir state that is shielded from losses arising in the MOT cooling cycle. This shielding leads to the observed atom-number enhancement in the steady-state. Our result persists in the presence of repumping lasers, and holds for all the stable strontium isotopes. The atom-number enhancement is preserved through the subsequent stages of the cooling and has boosted our efficiency for preparing strontium-84 Bose-Einstein condensates. As an outlook, we will discuss the progress of loading the condensate into a two-dimensional optical lattice and realizing a strontium quantum-gas microscope.
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