Core-Shell Magneto-Optical Trap for Alkaline-Earth-Metal-Like Atoms

Abstract

We propose and demonstrate a new magneto-optical trap (MOT) for alkaline-earth-metal-like (AEML) atoms where the narrow ${}^1{S}_0\to$${}^3{P}_1$ transition and the broad ${}^1{S}_0\to$${}^1{P}_1$ transition are spatially arranged into a core-shell configuration. Our scheme resolves the main limitations of previously adopted MOT schemes, leading to a significant increase in both the loading rate and the steady state atom number. We apply this scheme to ${}^{174}$Yb MOT, where we show about a hundred-fold improvement in the loading rate and ten-fold improvement in the steady state atom number compared to reported cases that we know of to date. This technique could be readily extended to other AEML atoms to increase the statistical sensitivity of many different types of precision experiments.

References in corpus (5)

• Spectroscopic observation of SU(N)-symmetric interactions in Sr orbital magnetism
• Observation of two-orbital spin-exchange interactions with ultracold SU(N)-symmetric fermions
• Quantum computing with alkaline earth atoms
• Precision measurement of gravity with cold atoms in an optical lattice and comparison with a classical gravimeter
• Laser-trapping of Ra-225 and Ra-226 with repumping by room temperature blackbody radiation

Cited by in corpus (11)

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• Ytterbium atom interferometry for dark matter searches
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• Laser-cooling Cadmium Bosons and Fermions with Near Ultraviolet Triplet Excitations
• Two-color magneto-optical trapping of ytterbium atoms
• Ultracold high-spin $\Sigma$-state polar molecules for new physics searches