Year: 2025
Type: article
Abstract: We experimentally demonstrate background-free, hyperfine-level-selective measurements of individual Cs atoms by simultaneous cooling to $5.3\text{ }\text{ }\mathrm{\ensuremath{\mu}}\mathrm{K}$ and imaging on the $6{s}_{1/2}\ensuremath{\rightarrow}5{d}_{5/2}$ electric-quadrupole transition. We achieve hyperfine-resolved detection with fidelity 0.9993(4) and atom retention of 0.9954(5), limited primarily by vacuum lifetime. Performing state measurements in a 3D cooling configuration enables repeated low loss measurements. A theoretical analysis of an extension of the demonstrated approach, based on quenching of the excited state with an auxiliary field, identifies parameters for hyperfine-resolved measurements with a projected fidelity of $\ensuremath{\sim}0.9995$ in $\ensuremath{\sim}60\text{ }\text{ }\mathrm{\ensuremath{\mu}}\mathrm{s}$.
Source: Physical Review Letters
DOI: 10.1103/j4h9-fdvh
Authors: J. Scott, H. M. Lim, U. Singla, Q. Meece, C. Fang, J. T. Choy, S. Kolkowitz, T. M. Graham, M. Saffman
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4416657917