Shuttling ions at high speed and with low motional excitation is essential for realizing fast and high-fidelity algorithms in many trapped-ion-based quantum computing architectures. Achieving such performance is challenging due to the sensitivity of an ion to electric fields and the unknown and imperfect environmental and control variables that create them. Here we implement a closed-loop optimization of the voltage waveforms that control the trajectory and axial frequency of an ion during transport in order to minimize the final motional excitation. The resulting waveforms realize fast round-trip transport of a trapped ion across multiple electrodes at speeds of 0.5 electrodes per microsecond (35 m·s⁻¹ for a one-way transport of 210 μm in 6 μs) with a maximum of 0.36 ± 0.08 mean quanta gain. This sub-quanta gain is independent of the phase of the secular motion at the distal location, obviating the need for an electric field impulse or time delay to eliminate the coherent motion.

以高速和低运动激发穿梭离子对于在许多基于捕获离子的量子计算架构中实现快速和高保真算法至关重要。由于离子对电场的敏感性以及产生它们的未知和不完善的环境和控制变量，实现这种性能具有挑战性。在这里，我们实现了电压波形的闭环优化，以控制传输过程中离子的轨迹和轴向频率，以最小化最终的运动激发。产生的波形以每微秒 0.5 个电极的速度（35 m·s ^-1对于 6 μs 内 210 μm 的单向传输），最大平均量子增益为 0.36 ± 0.08。这种子量子增益与远端位置的长期运动的相位无关，不需要电场脉冲或时间延迟来消除相干运动。