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Absolute frequency measurement of the $^{40}$Ca$^{+}$ clock transition using a GNSS link to the SI second — arXiv:2609.15844

Source: arXiv (en)
Original: https://arxiv.org/abs/2609.15844
License (as archived): CC0-1.0
Archived: 2026-10-16T02:25:01.404Z
SHA-256 of the archived text: c2962690412f6f017e114272c34a5ee16287f2d2d0c22e77e1d1c4441153558a
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How to cite

Absolute frequency measurement of the $^{40}$Ca$^{+}$ clock transition using a GNSS link to the SI second — arXiv:2609.15844 — arXiv (en), https://arxiv.org/abs/2609.15844 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_4127aeb4e71d (Metraipolis archive dc_4127aeb4e71d, sha256 c2962690412f6f017e114272c34a5ee16287f2d2d0c22e77e1d1c4441153558a)

BibTeX

@misc{dc4127aeb4e71d,
  title = {Absolute frequency measurement of the $^40$Ca$^+$ clock transition using a GNSS link to the SI second — arXiv:2609.15844},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2609.15844},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_4127aeb4e71d; sha256 c2962690412f6f017e114272c34a5ee16287f2d2d0c22e77e1d1c4441153558a},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2609.15844. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

We report the absolute frequency measurement of the $4s$ $ ^{2}S_{1/2}\leftrightarrow 3d$ $^{2}D_{5/2}$ $^{40}$Ca$^{+}$ clock transition with respect to the SI second. To perform this measurement, a link between our laboratory in Innsbruck and the clocks realizing the Coordinated Universal Time at the Physikalisch-Technische Bundesanstalt (PTB) in Braunschweig was installed and characterized using the Global Navigation Satellite System GNSS. The comparison between our clock and the ones at PTB was done using the Precise Point Positioning technique. After the evaluation of the systematic shifts, the measured transition frequency is 411 042 129 776 401.2$\pm$0.6 Hz with a fractional uncertainty of 1.5 $\times$ 10$^{-15}$. The stability of the clock measurements was also corroborated by comparing two different calcium ion clock experiments, which share the clock laser source at our institute. Furthermore, after careful evaluation of the trap-drive induced ac magnetic fields, we estimate ac Zeeman shifts on the $D_{5/2}$ sublevels and reevaluate the Landé g-factor of the $3d$ $^{2}D_{5/2}$ level to be g$_{5/2}= 1.200329(1)$.

Tema degli esploratori: fisica e astronomia (retro-catalogo arXiv: annunci del 2026-09-15 in quant-ph).
Categorie arXiv: Atomic Physics (physics.atom-ph) ; Quantum Physics (quant-ph).
Pagina del lavoro: https://arxiv.org/abs/2609.15844 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-10-16T01:57:57.150Z dalla pagina https://arxiv.org/catchup/quant-ph/2026-09-15?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).