Investigating the $4D_{3/2}|3,\pm 2⟩$--$4D_{5/2}|3,\pm 2⟩$ transition in Nb${}^{4+}$ for a THz atomic clock

Abstract

In this work, the $4D_{3/2}|3,\pm 2⟩\to 4D_{5/2}|3,\pm 2⟩$ transition in the Nb${}^{4+}$ ion is identified as a promising candidate for a terahertz (THz) atomic clock, with the transition frequency occurring at 56.0224 THz. This transition is primarily driven by the magnetic dipole decay channel, which can easily be accessed by a laser. We focus on the stable ${}^{93}$Nb isotope, which has 100\% natural abundance and a nuclear spin of $I=9/2$ for experimental advantage. Our data analysis allows us to estimate potential systematic shifts in the proposed clock system, including those due to blackbody radiation, electric quadrupole, second-order Zeeman, and second-order Doppler {shifts}. {The scheme presented in this study can help suppress the AC Stark and electric quadrupole shifts in the clock frequency measurement.} {All these analyses} suggest that the proposed THz atomic clock using Nb${}^{4+}$ could be valuable in both quantum thermometry and frequency metrology.

11 pages, 4 Tables, 1 figure

References in corpus (9)

• A New Method for Gravitational Wave Detection with Atomic Sensors
• Improved frequency measurement of a one-dimensional optical lattice clock with a spin-polarized fermionic ${}^{87}$Sr isotope
• Evaluation of Doppler Shifts to Improve the Accuracy of Primary Atomic Fountain Clocks
• Blackbody radiation shift in a 43Ca+ ion optical frequency standard
• Towards a Transportable Aluminium Ion Quantum Logic Optical Clock
• Correlation Trends in the Hyperfine Structures of ${}^{210,212}$Fr
• Optical clocks based on the Cf${}^{15+}$ and Cf${}^{17+}$ ions
• Quadrupole Shifts for the ${}^{171}$Yb${}^{+}$ Ion Clocks: Experiments versus Theories
• Electron-correlation study of Y III-Tc VII ions using a relativistic coupled-cluster theory