Related papers: Investigating the $4D_{3/2}|3,\pm2\rangle$--$4D_{5/2}|3,\pm2\rangle$ transition in Nb$^{4+}$ for a THz atomic clock

Investigating the $4D_{3/2}|3,\pm2\rangle$--$4D_{5/2}|3,\pm2\rangle$ transition in Nb$^{4+}$ for a THz atomic clock

URL: http://arxiv.org/abs/2504.15493v1
Date: Mon, 21 Apr 2025 23:50:52 GMT
Title: Investigating the $4D_{3/2}|3,\pm2\rangle$--$4D_{5/2}|3,\pm2\rangle$ transition in Nb$^{4+}$ for a THz atomic clock
Authors: Jyoti, A. Chakraborty, Zhiyang Wang, Jia Zhang, Jingbiao Chen, Bindiya Arora, B. K. Sahoo,
Abstract summary: The $4D_3/2|3,pm2rangle rightarrow 4D_5/2|3,pm2rangle$ transition in the Nb$4+$ ion is identified as a promising candidate for a terahertz (THz) atomic clock.
Score: 7.38782785713903
License: http://creativecommons.org/licenses/by/4.0/
Abstract: In this work, the $4D_{3/2}|3,\pm2\rangle \rightarrow 4D_{5/2}|3,\pm2\rangle$ 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.

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