Skip to main content

NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.

Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.

U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Excited-Band Coherent Delocalization for Improved Optical Lattice Clock Performance

Published

Author(s)

Jacob Siegel, Andrew Ludlow, Youssef Hassan, Kyle Beloy, Tanner Grogan, Chun-Chia Chen

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 co- herent delocalization, we suppress cold-collision shifts and two-body losses. Atom loss attributed to Landau-Zener tunneling would otherwise compromise coherent delocalization at low trap depths for our 171Yb 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 3P0 excited-state as 5.7(7) × 10−4 Er −1s−1 and 19(2) s, respectively.
Citation
Physical Review Letters

Citation

Siegel, J. , Ludlow, A. , Hassan, Y. , Beloy, K. , Grogan, T. and Chen, C. (2024), Excited-Band Coherent Delocalization for Improved Optical Lattice Clock Performance, Physical Review Letters, [online], https://doi.org/10.1103/PhysRevLett.132.133201, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=956376 (Accessed October 10, 2025)

Issues

If you have any questions about this publication or are having problems accessing it, please contact [email protected].

Created March 24, 2024, Updated June 7, 2024
Was this page helpful?