Doppler Shift Mitigation in a Chip-Scale Atomic Beam Clock

Fuente: arXiv

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Bibliographic Details
Main Authors:	Staron, Alexander, Martinez, Gabriela, Nardelli, Nicholas, Autry, Travis, Kitching, John, McGehee, William
Format:	Preprint
Published:	2025
Subjects:	Atomic Physics
Online Access:	Acceder al recurso
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_version_	1866909013913894912
author	Staron, Alexander Martinez, Gabriela Nardelli, Nicholas Autry, Travis Kitching, John McGehee, William
author_facet	Staron, Alexander Martinez, Gabriela Nardelli, Nicholas Autry, Travis Kitching, John McGehee, William
contents	Chip-scale microwave atomic systems based on thermal atomic beams offer a promising approach to realize low-power and low-drift clocks for timing holdover applications. Miniature beam clocks are expected to suppress many of the shifts that commonly limit existing chip-scale atomic clocks based on coherent population trapping, including collisional shifts and some light shifts. However, the beam geometry can amplify some challenges such as Doppler shifts, which generate a strong sensitivity to laser frequency variation. Using a cm-scale 87Rb atom beam clock, we identify a surprisingly strong competition between Doppler shifts and resonant light shifts arising from asymmetric decay in the clock spectroscopy Λ-system. Leveraging this competition between Doppler and resonant light shifts, we demonstrate clock operation at specific, convenient experimental parameters consistent with zero sensitivity to laser frequency variation and white-noise-limited clock frequency averaging for 1000 s of integration.
format	Preprint
id	arxiv_https___arxiv_org_abs_2512_04905
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Doppler Shift Mitigation in a Chip-Scale Atomic Beam Clock Staron, Alexander Martinez, Gabriela Nardelli, Nicholas Autry, Travis Kitching, John McGehee, William Atomic Physics Chip-scale microwave atomic systems based on thermal atomic beams offer a promising approach to realize low-power and low-drift clocks for timing holdover applications. Miniature beam clocks are expected to suppress many of the shifts that commonly limit existing chip-scale atomic clocks based on coherent population trapping, including collisional shifts and some light shifts. However, the beam geometry can amplify some challenges such as Doppler shifts, which generate a strong sensitivity to laser frequency variation. Using a cm-scale 87Rb atom beam clock, we identify a surprisingly strong competition between Doppler shifts and resonant light shifts arising from asymmetric decay in the clock spectroscopy Λ-system. Leveraging this competition between Doppler and resonant light shifts, we demonstrate clock operation at specific, convenient experimental parameters consistent with zero sensitivity to laser frequency variation and white-noise-limited clock frequency averaging for 1000 s of integration.
title	Doppler Shift Mitigation in a Chip-Scale Atomic Beam Clock
topic	Atomic Physics
url	https://arxiv.org/abs/2512.04905