$^{115}$In$^+$-$^{172}$Yb$^+$ Coulomb crystal clock with $2.5\times10^{-18}$ systematic uncertainty
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| Main Authors: | , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| author | Hausser, H. N. Keller, J. Nordmann, T. Bhatt, N. M. Kiethe, J. Liu, H. Richter, I. M. von Boehn, M. Rahm, J. Weyers, S. Benkler, E. Lipphardt, B. Doerscher, S. Stahl, K. Klose, J. Lisdat, C. Filzinger, M. Huntemann, N. Peik, E. Mehlstäubler, T. E. |
| author_facet | Hausser, H. N. Keller, J. Nordmann, T. Bhatt, N. M. Kiethe, J. Liu, H. Richter, I. M. von Boehn, M. Rahm, J. Weyers, S. Benkler, E. Lipphardt, B. Doerscher, S. Stahl, K. Klose, J. Lisdat, C. Filzinger, M. Huntemann, N. Peik, E. Mehlstäubler, T. E. |
| contents | We present a scalable mixed-species Coulomb crystal clock based on the $^1S_0$ $\leftrightarrow$ $^3P_0$ transition in $^{115}$In$^+$. $^{172}$Yb$^+$ ions are co-trapped and used for sympathetic cooling. Reproducible interrogation conditions for mixed-species Coulomb crystals are ensured by a conditional preparation sequence with permutation control. We demonstrate clock operation with a 1In$^+$-3Yb$^+$ crystal, achieving a relative systematic uncertainty of $2.5\times10^{-18}$ and a relative frequency instability of $1.6\times10^{-15}/\sqrt{τ/1\;\mathrm{s}}$. We report on absolute frequency measurements with an uncertainty of $1.3\times10^{-16}$ and optical frequency comparisons with clocks based on $^{171}$Yb$^+$ (E3) and $^{87}$Sr. With a fractional uncertainty of $4.4\times10^{-18}$, the former is - to our knowledge - the most accurate frequency ratio value reported to date. For the $^{115}$In$^+$/$^{87}$Sr ratio, we improve upon the best previous measurement by more than an order of magnitude. We also demonstrate operation with four $^{115}$In$^+$ clock ions, which reduces the instability to $9.2\times10^{-16}/\sqrt{τ/1\;\mathrm{s}}$. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2402_16807 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | $^{115}$In$^+$-$^{172}$Yb$^+$ Coulomb crystal clock with $2.5\times10^{-18}$ systematic uncertainty Hausser, H. N. Keller, J. Nordmann, T. Bhatt, N. M. Kiethe, J. Liu, H. Richter, I. M. von Boehn, M. Rahm, J. Weyers, S. Benkler, E. Lipphardt, B. Doerscher, S. Stahl, K. Klose, J. Lisdat, C. Filzinger, M. Huntemann, N. Peik, E. Mehlstäubler, T. E. Atomic Physics Quantum Physics We present a scalable mixed-species Coulomb crystal clock based on the $^1S_0$ $\leftrightarrow$ $^3P_0$ transition in $^{115}$In$^+$. $^{172}$Yb$^+$ ions are co-trapped and used for sympathetic cooling. Reproducible interrogation conditions for mixed-species Coulomb crystals are ensured by a conditional preparation sequence with permutation control. We demonstrate clock operation with a 1In$^+$-3Yb$^+$ crystal, achieving a relative systematic uncertainty of $2.5\times10^{-18}$ and a relative frequency instability of $1.6\times10^{-15}/\sqrt{τ/1\;\mathrm{s}}$. We report on absolute frequency measurements with an uncertainty of $1.3\times10^{-16}$ and optical frequency comparisons with clocks based on $^{171}$Yb$^+$ (E3) and $^{87}$Sr. With a fractional uncertainty of $4.4\times10^{-18}$, the former is - to our knowledge - the most accurate frequency ratio value reported to date. For the $^{115}$In$^+$/$^{87}$Sr ratio, we improve upon the best previous measurement by more than an order of magnitude. We also demonstrate operation with four $^{115}$In$^+$ clock ions, which reduces the instability to $9.2\times10^{-16}/\sqrt{τ/1\;\mathrm{s}}$. |
| title | $^{115}$In$^+$-$^{172}$Yb$^+$ Coulomb crystal clock with $2.5\times10^{-18}$ systematic uncertainty |
| topic | Atomic Physics Quantum Physics |
| url | https://arxiv.org/abs/2402.16807 |