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arXiv · 2511.15959

High-Fidelity Raman Spin-Dependent Kicks in the Presence of Micromotion

Haonan Liu·Varun D. Vaidya·Monica Gutierrez Galan·Alexander K. Ratcliffe·Amrit Poudel·C. Ricardo Viteri
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Abstract

We propose high-fidelity single-qubit spin-dependent kicks (SDKs) for trapped ions using nanosecond Raman pulses via amplitude modulation of a continuous-wave laser with a tunable beat frequency. We develop a general method for maintaining SDK performance in the presence of micromotion by identifying optimal choices of the RF phase and frequency that suppress unwanted backward kicks. The proposed scheme enables SDK infidelities as low as $10^{-9}$ in the absence of micromotion, and below $10^{-5}$ with micromotion. This study lays the foundation for the realization of sub-trap-period and high-fidelity two-qubit gates based on SDKs.

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Haonan Liu, Varun D. Vaidya, Monica Gutierrez Galan, Alexander K. Ratcliffe, Amrit Poudel, C. Ricardo Viteri. 2025-11-20. High-Fidelity Raman Spin-Dependent Kicks in the Presence of Micromotion. https://doi.org/10.1103/972s-wd2q

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