Related papers: Characterization and active cancellation of power-line-induced motional-mode frequency noise in a trapped-ion system

Characterization and active cancellation of power-line-induced motional-mode frequency noise in a trapped-ion system

URL: http://arxiv.org/abs/2602.19588v1
Date: Mon, 23 Feb 2026 08:23:24 GMT
Title: Characterization and active cancellation of power-line-induced motional-mode frequency noise in a trapped-ion system
Authors: Jaehun You, Jiyong Kang, Kyunghye Kim, Wonhyeong Choi, Taehyun Kim,
Abstract summary: stability of motional-mode frequency is essential for realizing high-fidelity quantum gates in trapped-ion quantum computing.<n>We report a systematic investigation of 60-Hz power-line noise and its effect on the secular frequencies of a single $171mathrmYb+$ ion.<n>Our results provide both a clear characterization of periodic motional-mode noise and a practical framework for its suppression in trapped-ion quantum computing platforms.
Score: 6.353193172884524
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: The stability of motional-mode frequency is essential for realizing high-fidelity quantum gates in trapped-ion quantum computing. While broadband Gaussian noise has been extensively studied and mitigated using pulse shaping techniques, the impact of coherent periodic noise has remained largely unexplored. Here we report a systematic investigation of 60-Hz power-line noise and its effect on the secular frequencies of a single ${}^{171}\mathrm{Yb}^{+}$ ion. Using spin-echo Ramsey spectroscopy, we characterize the amplitude and phase of the resulting secular-frequency modulation and validate this characterization via passive phase correction of the Ramsey sequence. Building on this, we implement active cancellation by injecting a compensation tone into the set-point of a PI controller that stabilizes the trap RF drive amplitude. A phasor-fitting procedure optimizes the amplitude and phase of the compensation signal, enabling near-complete suppression of the 60-Hz component. With active cancellation engaged, the coherence time of a radial motional mode is extended from approximately 10 ms to 35 ms, consistent with the limit set by motional heating. Our results provide both a clear characterization of periodic motional-mode noise and a practical framework for its suppression in trapped-ion quantum computing platforms.

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