Inverse identification of thermal-radiative parameters for reduced effective-temperature uncertainty in an ion optical clock
Abstract
The blackbody-radiation (BBR) shift remains a leading systematic uncertainty of room-temperature single-ion optical clocks. Accurate evaluation of this shift requires the effective temperature at the ion position, which is difficult because RF heating, low and spatially varying surface emissivity and inaccessible trap surfaces make this quantity difficult to measure directly. Here, we developed a hybrid inversion framework that combines radiance-domain infrared thermography, black-painted high-emissivity reference regions, a finite-element model of a 171Yb+ end-cap ion trap and a reduced-order surrogate for repeated forward calculations and parameter identification. The surrogate reproduced the FE test fields with a full-field mean absolute error (MAE) of 0.02220 mK. The calibrated model predicted the ion-position effective temperature with a combined standard uncertainty of 155.0 mK, corresponding to a temperature-related BBR frequency-shift uncertainty of 1.647 x 10^-19 for the 2S1/2-2F7/2 (467 nm) E3 transition. This method provides a reproducible route for reducing and tracing the BBR uncertainty of room-temperature trapped-ion optical clocks.
Related
- Radiative proton capture on 12C in cluster effective field theory
- Probing temperature dependent non-radiative decay channels in CrSBr with nonlinear optics
- Near-Threshold Dynamics of \c{hi}c1(3872) and T+cc(3875) States via Effective Range Expansion and Monte Carlo Uncertainty Propagation
- EFT Validity and Truncation Uncertainty from few Nuisance Parameters
- One-loop QED effective action at finite temperature and density beyond HTL limit
BibTeX
@misc{zhao2026inverse,
title = {{Inverse identification of thermal-radiative parameters for reduced effective-temperature uncertainty in an ion optical clock}},
author = {Jie Zhao and Yani Zuo and Shaoyang Dai and Chaowei Wang and Ang Huang and Jian Song and Guangyao Wang and Fangfei Wu and Haotian Shi and Zhengyong Li and Fang Fang},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.14796},
eprint = {2610.14796},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.14796},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Inverse identification of thermal-radiative parameters for reduced effective-temperature uncertainty in an ion optical clock
AU - Jie Zhao
AU - Yani Zuo
AU - Shaoyang Dai
AU - Chaowei Wang
AU - Ang Huang
AU - Jian Song
AU - Guangyao Wang
AU - Fangfei Wu
AU - Haotian Shi
AU - Zhengyong Li
AU - Fang Fang
PY - 2026
DA - 2026/10/10
PB - arXiv
DO - 10.48550/arxiv.2610.14796
UR - https://arxiv.org/abs/2610.14796
AB - The blackbody-radiation (BBR) shift remains a leading systematic uncertainty of room-temperature single-ion optical clocks. Accurate evaluation of this shift requires the effective temperature at the ion position, which is difficult because RF heating, low and spatially varying surface emissivity and inaccessible trap surfaces make this quantity difficult to measure directly. Here, we developed a hybrid inversion framework that combines radiance-domain infrared thermography, black-painted high-emissivity reference regions, a finite-element model of a 171Yb+ end-cap ion trap and a reduced-order surrogate for repeated forward calculations and parameter identification. The surrogate reproduced the FE test fields with a full-field mean absolute error (MAE) of 0.02220 mK. The calibrated model predicted the ion-position effective temperature with a combined standard uncertainty of 155.0 mK, corresponding to a temperature-related BBR frequency-shift uncertainty of 1.647 x 10^-19 for the 2S1/2-2F7/2 (467 nm) E3 transition. This method provides a reproducible route for reducing and tracing the BBR uncertainty of room-temperature trapped-ion optical clocks.
ER -