High-accuracy multi-ion spectroscopy with mixed-species Coulomb crystals

• URL: http://arxiv.org/abs/2501.09615v1
• Date: Thu, 16 Jan 2025 15:40:45 GMT
• Title: High-accuracy multi-ion spectroscopy with mixed-species Coulomb crystals
• Authors: J. Keller, H. N. Hausser, I. M. Richter, T. Nordmann, N. M. Bhatt, J. Kiethe, H. Liu, E. Benkler, B. Lipphardt, S. Dörscher, K. Stahl, J. Klose, C. Lisdat, M. Filzinger, N. Huntemann, E. Peik, T. E. Mehlstäubler,
• Abstract summary: Operation with four clock ions reduces the instability from $1.6times10-15/sqrtt/ (1;mathrms)$ to $9.2times10-16/sqrtt/ (1;mathrms)$. We derive a model for decay-related dead time during state preparation, which matches the observed scaling of instability with clock ion number $N$.
• Score: 0.17967666664330376
• License:
• Abstract: Multi-ion optical clocks offer the possibility of overcoming the low signal-to-noise ratio of single-ion clocks, while still providing low systematic uncertainties. We present simultaneous spectroscopy of up to four ${}^{115}$In${}^+$ clock ions in a linear Coulomb crystal, sympathetically cooled with ${}^{172}$Yb${}^+$ ions. In first clock comparisons, we see agreement below $1\times10^{-17}$ with results obtained using a single In${}^+$ ion, for which we have evaluated the systematic uncertainty to be $2.5\times10^{-18}$. Operation with four clock ions reduces the instability from $1.6\times10^{-15}/\sqrt{t/(1\;\mathrm{s})}$ to $9.2\times10^{-16}/\sqrt{t/(1\;\mathrm{s})}$. We derive a model for decay-related dead time during state preparation, which matches the observed scaling of instability with clock ion number $N$, and indicates that $1/\sqrt{N}$ scaling can be achieved with the addition of a repump laser.

Related papers

• An optical atomic clock using $4D_J$ states of rubidium [0.7499722271664147]
  We analyze an optical atomic clock using two-photon $5S_1/2 rightarrow 4D_J$ transitions in rubidium. Four one- and two-color excitation schemes to probe the fine-structure states $4D_3/2$ and $4D_5/2$ are considered in detail.
  arXiv  Detail & Related papers  (2024-06-13T17:40:06Z)
• Aggregate Frequency Width, Nuclear Hyperfine Coupling and Jahn-Teller Effect of $Cu^{2+}$ Impurity Ion ESR in $SrLaAlO_4$ Dielectric Resonator at $20$ Millikelvin [0.0]
  impurity paramagnetic ion, $Cu2+$ substitutes $Al$ in the $SrLaAlO_4$ single crystal lattice. The anisotropy of the hyperfine structure reveals a characteristics of static Jahn-Teller effect.
  arXiv  Detail & Related papers  (2024-03-24T22:40:36Z)
• $^{115}$In$^+$-$^{172}$Yb$^+$ Coulomb crystal clock with $2.5\times10^{-18}$ systematic uncertainty [0.1715290206208946]
  We present a scalable mixed-species Coulomb crystal clock based on the transition in $115$In$+$. We demonstrate operation with four $115$In$+$ clock ions, which reduces the instability to $9.2times10-16/sqrttau/1;mathrms$.
  arXiv  Detail & Related papers  (2024-02-26T18:29:12Z)
• $^{174}\mathrm{Yb}^+$-$^{113}\mathrm{Cd}^+$ sympathetic-cooling bi-species Coulomb crystal applied to microwave frequency standard [0.11242503819703256]
  Bi-species Coulomb crystal comprises $174mathrmYb+$-$113mathrmCd+$ ions as coolant. Results indicate using $174mathrmYb+$ as coolant ions for $113mathrmCd+$ is far superior.
  arXiv  Detail & Related papers  (2023-07-04T11:29:45Z)
• Rydberg ions in coherent motional states: A new method for determining the polarizability of Rydberg ions [71.05995184390709]
  We present a method for measuring the polarizability of Rydberg ions confined in a Paul trap. The method is easy-to-implement and applicable to different Rydberg states regardless of their principal or angular quantum numbers.
  arXiv  Detail & Related papers  (2022-08-23T17:56:50Z)
• Rapid generation of all-optical $^{39}$K Bose-Einstein condensates using a low-field Feshbach resonance [58.720142291102135]
  We investigate the production of all-optical $39$K Bose-Einstein condensates with different scattering lengths using a Feshbach resonance near $33$ G. We are able to produce fully condensed ensembles with $5.8times104$ atoms within $850$ ms evaporation time at a scattering length of $232. Based on our findings we describe routes towards high-flux sources of ultra-cold potassium for inertial sensing.
  arXiv  Detail & Related papers  (2022-01-12T16:39:32Z)
• Ion-molecule reactions below 1~K: Observation of a strong enhancement of the reaction rate of the ion-dipole reaction He$^+$+ CH$_3$F [55.41644538483948]
  Reaction between He$+$ and CH$_3$F forming predominantly CH$+$ and CHF$+$. To avoid heating of the ions by stray electric fields, the reaction was observed within the orbit of a highly excited Rydberg electron.
  arXiv  Detail & Related papers  (2021-12-22T17:32:43Z)
• Fast qubits of optical frequencies on the rare-earth ions in fluoride crystals and color centers in diamond [62.997667081978825]
  Fluoride crystals doped with rare-earth ions (REI) and pair centers in diamond for fast ($10-9rms$) quantum computers (FQC) are proposed.
  arXiv  Detail & Related papers  (2021-03-23T10:00:56Z)
• Algorithmic Ground-state Cooling of Weakly-Coupled Oscillators using Quantum Logic [52.77024349608834]
  We introduce a novel algorithmic cooling protocol for transferring phonons from poorly- to efficiently-cooled modes. We demonstrate it experimentally by simultaneously bringing two motional modes of a Be$+$-Ar$13+$ mixed Coulomb crystal close to their zero-point energies. We reach the lowest temperature reported for a highly charged ion, with a residual temperature of only $Tlesssim200mathrmmu K$ in each of the two modes.
  arXiv  Detail & Related papers  (2021-02-24T17:46:15Z)
• Trapping, Shaping and Isolating of Ion Coulomb Crystals via State-selective Optical Potentials [55.41644538483948]
  In conventional ion traps, the trapping potential is close to independent of the electronic state, providing confinement for ions dependent on their charge-to-mass ratio $Q/m$. Here we experimentally study optical dipole potentials for $138mathrmBa+$ ions stored within two distinctive traps operating at 532 nm and 1064 nm.
  arXiv  Detail & Related papers  (2020-10-26T14:36:48Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.