Excited-Band Coherent Delocalization for Improved Optical Lattice Clock Performance.
Phys Rev Lett
; 132(13): 133201, 2024 Mar 29.
Article
em En
| MEDLINE
| ID: mdl-38613284
ABSTRACT
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 â¼7 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)×10^{-4} E_{r}^{-1} s^{-1} and 19(2) s, respectively.
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MEDLINE
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En
Ano de publicação:
2024
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Article