Laser cooling and qubit measurements on a forbidden transition in neutral Cs atoms
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866911404769935360 |
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| author | Scott, J. Lim, H. M. Singla, U. Meece, Q. Fang, C. Choy, J. T. Kolkowitz, S. Graham, T. M. Saffman, M. |
| author_facet | Scott, J. Lim, H. M. Singla, U. Meece, Q. Fang, C. Choy, J. T. Kolkowitz, S. Graham, T. M. Saffman, M. |
| contents | We experimentally demonstrate background-free, hyperfine-level-selective measurements of individual Cs atoms by simultaneous cooling to $5.3~μ\rm K$ and imaging on the $6s_{1/2}\rightarrow 5d_{5/2}$ 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 $\sim 0.9995 $ in $\sim 60~μ\rm s$. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2507_01720 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Laser cooling and qubit measurements on a forbidden transition in neutral Cs atoms Scott, J. Lim, H. M. Singla, U. Meece, Q. Fang, C. Choy, J. T. Kolkowitz, S. Graham, T. M. Saffman, M. Quantum Physics Atomic Physics We experimentally demonstrate background-free, hyperfine-level-selective measurements of individual Cs atoms by simultaneous cooling to $5.3~μ\rm K$ and imaging on the $6s_{1/2}\rightarrow 5d_{5/2}$ 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 $\sim 0.9995 $ in $\sim 60~μ\rm s$. |
| title | Laser cooling and qubit measurements on a forbidden transition in neutral Cs atoms |
| topic | Quantum Physics Atomic Physics |
| url | https://arxiv.org/abs/2507.01720 |