Experimental determination of the E2−M1 polarizability of the strontium clock transition

authored by: S. Dörscher, J. Klose, S. Maratha palli, Christian Lisdat
Abstract: To operate an optical lattice clock at a fractional uncertainty below 10-17, one must typically consider not only electric-dipole (E1) interaction between an atom and the lattice light field when characterizing the resulting lattice light shift of the clock transition but also higher-order multipole contributions, such as electric-quadrupole (E2) and magnetic-dipole (M1) interactions. However, strongly incompatible values have been reported for the E2-M1 polarizability difference of the clock states (5s5p)3P0 and (5s2)1S0 of strontium [Ushijima, Phys. Rev. Lett. 121, 263202 (2018)0031-900710.1103/PhysRevLett.121.263202; Porsev, Phys. Rev. Lett. 120, 063204 (2018)0031-900710.1103/PhysRevLett.120.063204; Wu, Phys. Rev. A 100, 042514 (2019)2469-992610.1103/PhysRevA.100.042514]. This largely precludes operating strontium clocks with uncertainties of a few 10-18, as the resulting lattice light shift corrections deviate by up to 1×10-17 from each other at typical trap depths. We have measured the E2-M1 light shift coefficient using our Sr87 lattice clock and find a value of Δαqm=-987-223+174μHz. This result is in very good agreement with the value reported by Ushijima et al. [Phys. Rev. Lett. 121, 263202 (2018)0031-900710.1103/PhysRevLett.121.263202].
External Organisation(s): National Metrology Institute of Germany (PTB)
Type: Article
Journal: Physical Review Research
Volume: 5
ISSN: 2643-1564
Publication date: 07.02.2023
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Physics and Astronomy(all)
Electronic version(s): https://doi.org/10.1103/PhysRevResearch.5.L012013 (Access: Open)

BibTeX

@article{1eab602861b14bc8863858875380c6cc,
title = "Experimental determination of the E2−M1 polarizability of the strontium clock transition",
abstract = "To operate an optical lattice clock at a fractional uncertainty below 10-17, one must typically consider not only electric-dipole (E1) interaction between an atom and the lattice light field when characterizing the resulting lattice light shift of the clock transition but also higher-order multipole contributions, such as electric-quadrupole (E2) and magnetic-dipole (M1) interactions. However, strongly incompatible values have been reported for the E2-M1 polarizability difference of the clock states (5s5p)3P0 and (5s2)1S0 of strontium [Ushijima, Phys. Rev. Lett. 121, 263202 (2018)0031-900710.1103/PhysRevLett.121.263202; Porsev, Phys. Rev. Lett. 120, 063204 (2018)0031-900710.1103/PhysRevLett.120.063204; Wu, Phys. Rev. A 100, 042514 (2019)2469-992610.1103/PhysRevA.100.042514]. This largely precludes operating strontium clocks with uncertainties of a few 10-18, as the resulting lattice light shift corrections deviate by up to 1×10-17 from each other at typical trap depths. We have measured the E2-M1 light shift coefficient using our Sr87 lattice clock and find a value of Δαqm=-987-223+174μHz. This result is in very good agreement with the value reported by Ushijima et al. [Phys. Rev. Lett. 121, 263202 (2018)0031-900710.1103/PhysRevLett.121.263202].",
author = "S. D{\"o}rscher and J. Klose and {Maratha palli}, S. and Christian Lisdat",
note = "Publisher Copyright: {\textcopyright} 2023 authors. Published by the American Physical Society.",
year = "2023",
month = feb,
day = "7",
doi = "10.1103/PhysRevResearch.5.L012013",
language = "English",
volume = "5",
journal = "Physical Review Research",
issn = "2643-1564",
publisher = "American Physical Society",
number = "1",
}