Excited-Band Coherent Delocalization for Improved Optical Lattice Clock Performance
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arXiv
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| Format: | Preprint |
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2024
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| author | Siegel, Jacob McGrew, William Hassan, Youssef Chen, Chun-Chia Beloy, Kyle Grogan, Tanner Zhang, Xiaogang Ludlow, Andrew |
| author_facet | Siegel, Jacob McGrew, William Hassan, Youssef Chen, Chun-Chia Beloy, Kyle Grogan, Tanner Zhang, Xiaogang Ludlow, Andrew |
| contents | We implement coherent delocalization as a tool for improving the two primary metrics of atomic clock performance: systematic uncertainty and instability. By decreasing atomic density with coherent delocalization, we suppress cold-collision shifts and two-body losses. Atom loss attributed to Landau-Zener tunneling in the ground lattice band would compromise coherent delocalization at low trap depths for our $^{171}$Yb atoms; hence, we implement for the first time delocalization in excited lattice bands. Doing so increases the spatial distribution of atoms trapped in the vertically-oriented optical lattice by $\sim7$ times. At the same time we observe a reduction of the cold-collision shift by 6.5(8) times, while also making inelastic two-body loss negligible. With these advantages, we measure the trap-light-induced quenching rate and natural lifetime of the ${}^3$P${}_0$ excited-state as $5.7(7)\times10^{-4}$ $E_r^{-1}s^{-1}$ and 19(2) s, respectively. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_04968 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Excited-Band Coherent Delocalization for Improved Optical Lattice Clock Performance Siegel, Jacob McGrew, William Hassan, Youssef Chen, Chun-Chia Beloy, Kyle Grogan, Tanner Zhang, Xiaogang Ludlow, Andrew Atomic Physics We implement coherent delocalization as a tool for improving the two primary metrics of atomic clock performance: systematic uncertainty and instability. By decreasing atomic density with coherent delocalization, we suppress cold-collision shifts and two-body losses. Atom loss attributed to Landau-Zener tunneling in the ground lattice band would compromise coherent delocalization at low trap depths for our $^{171}$Yb atoms; hence, we implement for the first time delocalization in excited lattice bands. Doing so increases the spatial distribution of atoms trapped in the vertically-oriented optical lattice by $\sim7$ times. At the same time we observe a reduction of the cold-collision shift by 6.5(8) times, while also making inelastic two-body loss negligible. With these advantages, we measure the trap-light-induced quenching rate and natural lifetime of the ${}^3$P${}_0$ excited-state as $5.7(7)\times10^{-4}$ $E_r^{-1}s^{-1}$ and 19(2) s, respectively. |
| title | Excited-Band Coherent Delocalization for Improved Optical Lattice Clock Performance |
| topic | Atomic Physics |
| url | https://arxiv.org/abs/2402.04968 |