Excited-Band Coherent Delocalization for Improved Optical Lattice Clock Performance.

J L Siegel, W F McGrew, Y S Hassan, C-C Chen, K Beloy, T Grogan, X Zhang, A D Ludlow

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Article in Physical review letters, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

Authors and funding

8 authors.

J L SiegelNational Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.

W F McGrewNational Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.

Y S HassanNational Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.

C-C ChenNational Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.

K BeloyNational Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.

T GroganNational Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.

X ZhangNational Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.

A D LudlowNational Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.

Funding

Intramural NIST DOC 9999-NIST

6 · The paper itself

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 ∼7 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.

Identifiers

PMID38613284

DOI10.1103/PhysRevLett.132.133201

PMCPMC11309023

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