Clock-Line-Mediated Sisyphus Cooling

Chen, Chun-Chia; Siegel, Jacob L.; Hunt, Benjamin D.; Grogan, Tanner; Hassan, Youssef S.; Beloy, Kyle; Gibble, Kurt; Brown, Roger C.; Ludlow, Andrew D.

doi:10.1103/physrevlett.133.053401

Phys. Rev. Lett.

2024

DOI: 10.1103/physrevlett.133.053401

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Clock-Line-Mediated Sisyphus Cooling

Chun-Chia Chen,

Jacob L. Siegel,

Benjamin D. Hunt

et al.

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2024

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Cited by 2 publications

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Laser-cooling Cadmium Bosons and Fermions with Near Ultraviolet Triplet Excitations

Gibble

2024

J. Phys.: Conf. Ser.

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Cadmium is laser-cooled and trapped with excitations to triplet states with UVA light, first using only the 67 kHz wide 326 nm intercombination line and subsequently, for large loading rates, the 25 MHz wide 361 nm 3 P 2 → 3 D 3 transition. Eschewing the hard UV 229 nm 1 S 0 → 1 P 1 transition, only small magnetic fields gradients, less than 6 G cm−1, are required enabling a 100% transfer of atoms from the 361 nm trap to the 326 nm narrow-line trap. All 8 stable cadmium isotopes are straightforwardly trapped, including two nuclear-spin- 1 2 fermions that require no additional repumping. We observe evidence of 3 P 2 collisions limiting the number of trapped metastable atoms, report isotope shifts for 111Cd and 113Cd of the 326 nm 1 S 0 → 3 P 1, 480nm 3 P 1 → 3 S 1, and 361 nm 3 P 2 → 3 D 3 transitions, and measure the 114Cd 5s5p 3 P 2 → 5s5d 3 D 3 transition frequency to be 830 096 573(15) MHz.

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Laser-cooling Cadmium Bosons and Fermions with Near Ultraviolet Triplet Excitations

Gibble

2024

J. Phys.: Conf. Ser.

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Ratchet loading and multi-ensemble operation in an optical lattice clock

Hassan,

Kobayashi,

Bothwell

et al. 2024

Quantum Sci. Technol.

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We demonstrate programmable control over the spatial distribution of ultra-cold atoms confined in an optical lattice. The control is facilitated through a combination of spatial manipulation of the magneto-optical trap and atomic population shelving to a metastable state. We first employ the technique to load an extended (5 mm) atomic sample with uniform density in an optical lattice clock, reducing atomic interactions and realizing remarkable frequency homogeneity across the atomic cloud. We also prepare multiple spatially separated atomic ensembles, and realize multi-ensemble clock operation within the standard one-dimensional (1D) optical lattice clock architecture. Leveraging this technique, we prepare two oppositely spin-polarized ensembles that are independently addressable, offering a platform for implementing spectroscopic protocols for enhanced tracking of local oscillator phase. Finally, we demonstrate a relative fractional frequency instability at one second of 2.4(1)×10-17 between two ensembles, useful for characterisation of intra-lattice differential systematics.

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Clock-Line-Mediated Sisyphus Cooling

Cited by 2 publications

References 47 publications

Laser-cooling Cadmium Bosons and Fermions with Near Ultraviolet Triplet Excitations

Laser-cooling Cadmium Bosons and Fermions with Near Ultraviolet Triplet Excitations

Ratchet loading and multi-ensemble operation in an optical lattice clock

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