Transportable strontium lattice clock with $4 \times 10^{-19}$ blackbody radiation shift uncertainty

Fuente: arXiv

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Bibliographic Details
Main Authors:	Nosske, I., Vishwakarma, C., Lücke, T., Rahm, J., Poudel, N., Weyers, S., Benkler, E., Dörscher, S., Lisdat, C.
Format:	Preprint
Published:	2025
Subjects:	Atomic Physics Quantum Physics
Online Access:	Acceder al recurso
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author	Nosske, I. Vishwakarma, C. Lücke, T. Rahm, J. Poudel, N. Weyers, S. Benkler, E. Dörscher, S. Lisdat, C.
author_facet	Nosske, I. Vishwakarma, C. Lücke, T. Rahm, J. Poudel, N. Weyers, S. Benkler, E. Dörscher, S. Lisdat, C.
contents	We describe a transportable optical lattice clock based on the $^1\mathrm{S}_0 \rightarrow {^3\mathrm{P}_0}$ transition of lattice-trapped $^{87}$Sr atoms with a total systematic uncertainty of $2.1 \times 10^{-18}$. The blackbody radiation shift, which is the leading systematic effect in many strontium lattice clocks, is controlled at the level of $4.0 \times 10^{-19}$, as the atoms are interrogated inside a well-characterised, cold thermal shield. Using a transportable clock laser, the clock reaches a frequency instability of about $5 \times 10^{-16}/\sqrt{τ/\mathrm{s}}$, which enables fast reevaluations of systematic effects. By comparing this clock to the primary caesium fountain clocks CSF1 and CSF2 at Physikalisch-Technische Bundesanstalt, we measure the clock transition frequency with a fractional uncertainty of $1.9\times 10^{-16}$, in agreement with previous results. The clock was successfully transported and operated at different locations. It holds the potential to be used for geodetic measurements with centimetre-level or better height resolution and for accurate inter-institute frequency comparisons.
format	Preprint
id	arxiv_https___arxiv_org_abs_2507_14030
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Transportable strontium lattice clock with $4 \times 10^{-19}$ blackbody radiation shift uncertainty Nosske, I. Vishwakarma, C. Lücke, T. Rahm, J. Poudel, N. Weyers, S. Benkler, E. Dörscher, S. Lisdat, C. Atomic Physics Quantum Physics We describe a transportable optical lattice clock based on the $^1\mathrm{S}_0 \rightarrow {^3\mathrm{P}_0}$ transition of lattice-trapped $^{87}$Sr atoms with a total systematic uncertainty of $2.1 \times 10^{-18}$. The blackbody radiation shift, which is the leading systematic effect in many strontium lattice clocks, is controlled at the level of $4.0 \times 10^{-19}$, as the atoms are interrogated inside a well-characterised, cold thermal shield. Using a transportable clock laser, the clock reaches a frequency instability of about $5 \times 10^{-16}/\sqrt{τ/\mathrm{s}}$, which enables fast reevaluations of systematic effects. By comparing this clock to the primary caesium fountain clocks CSF1 and CSF2 at Physikalisch-Technische Bundesanstalt, we measure the clock transition frequency with a fractional uncertainty of $1.9\times 10^{-16}$, in agreement with previous results. The clock was successfully transported and operated at different locations. It holds the potential to be used for geodetic measurements with centimetre-level or better height resolution and for accurate inter-institute frequency comparisons.
title	Transportable strontium lattice clock with $4 \times 10^{-19}$ blackbody radiation shift uncertainty
topic	Atomic Physics Quantum Physics
url	https://arxiv.org/abs/2507.14030