Transportable strontium lattice clock with 4×10−19 blackbody radiation shift uncertainty
Abstract
We describe a transportable optical lattice clock based on the
1S
0 →
3P
0 transition of lattice-trapped
87Sr atoms with a total systematic uncertainty of 2.1 ×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 ×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 ×10
−
16/pτ/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 ×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.
Details
- External Organisation(s)
-
Physikalisch-Technische Bundesanstalt PTB
- Type
- Article
- Journal
- Quantum Science and Technology
- Volume
- 10
- Pages
- 045076
- ISSN
- 2058-9565
- Publication date
- 28.10.2025
- Publication status
- Published
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics, Materials Science (miscellaneous), Physics and Astronomy (miscellaneous), Electrical and Electronic Engineering
- Electronic version(s)
-
https://doi.org/10.1088/2058-9565/ae1161 (Access:
Unknown
)
https://iopscience.iop.org/article/10.1088/2058-9565/ae1161 (Access: Unknown )
