Adding one or two linear constraints on the Fourier coefficients of an amplitude-modulated Mølmer-Sørensen pulse improves the leading-order gate-timing error from O(Δt²) to O(Δt⁶) or O(Δt¹⁰) with vanishing power overhead.
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Power-optimized amplitude modulation for robust trapped-ion entangling gates: a study of gate-timing errors
Adding one or two linear constraints on the Fourier coefficients of an amplitude-modulated Mølmer-Sørensen pulse improves the leading-order gate-timing error from O(Δt²) to O(Δt⁶) or O(Δt¹⁰) with vanishing power overhead.