Frequency metrology on the 4s 2S1/2 - 4p 2P1/2 transition in the calcium ion for a comparison with quasar data

Abstract

High accuracy frequency metrology on the 4s 2S1/2 - 4p 2P1/2 transition in calcium ions is performed using laser cooled and crystallized ions in a linear Paul trap. Calibration is performed with a frequency comb laser, resulting in a transition frequency of f=755222766.2(1.7) MHz. The accuracy presents an improvement of more than one order of magnitude, and will facilitate a comparison with quasar data in a search for a possible change of the fine structure constant on a cosmological time scale.

arXiv commentCorrected typos (including one on the axis of figure 6)

References in corpus (4)

• A Search for Time Variation of the Fine Structure Constant
• Further evidence for a variable fine-structure constant from Keck/HIRES QSO absorption spectra
• Quantum state engineering on an optical transition and decoherence in a Paul trap
• Evaluation of the ultimate performances of a Ca+ single-ion frequency standard

Cited by in corpus (20)

• Proxima's orbit around Alpha Centauri
• Challenges of laser-cooling molecular ions
• Precision spectroscopy by photon-recoil signal amplification
• Frequency Metrology on single trapped ions in the weak binding limit: The 3s1/2-3p3/2 transition in 24-Mg+
• Precision spectroscopy of the 3s-3p fine structure doublet in Mg+
• Precision measurement of the branching fractions of the 4P3/2 decay of Ca II
• Laboratory atomic transition data for precise optical quasar absorption spectroscopy
• Direct frequency comb spectroscopy of trapped ions
• Exposing the Gas Braking Mechanism of the beta Pictoris Disk
• Spectroscopy of a synthetic trapped ion qubit
• Reservoir spectroscopy of 5s5p ${}^3$P${}_2$ - 5s$n$d ${}^3$D${}_{1,2,3}$ transitions in strontium
• Detection of Single Ion Spectra by Coulomb Crystal Heating
• Unexpectedly large difference of the electron density at the nucleus in the 4p ${}^2$P${}_{1/2,3/2}$ fine-structure doublet of Ca${}^{+}$
• Parameter estimation in atomic spectroscopy using exceptional points
• Decoherence-assisted spectroscopy of a single Mg${}^{+}$ ion
• The TRAPSENSOR Facility: an Open-Ring 7-Tesla Penning Trap for Laser-Based Precision Experiments
• Atomic transition frequencies, isotope shifts, and sensitivity to variation of the fine structure constant for studies of quasar absorption spectra
• Direct spectroscopy of the ${}^2$S${}_{1/2}{-}^2$P${}_{1/2}$ and ${}^2$D${}_{3/2}{-}^2$P${}_{1/2}$ transitions and observation of micromotion modulated spectra in trapped \Ca
• Minimizing rf-induced excess micromotion of a trapped ion with the help of ultracold atoms
• Precision spectroscopy technique for dipole allowed transitions in laser cooled ions