Closed-loop optimization of fast trapped-ion shuttling with sub-quanta excitation

• URL: http://arxiv.org/abs/2201.07358v1
• Date: Tue, 18 Jan 2022 23:50:29 GMT
• Title: Closed-loop optimization of fast trapped-ion shuttling with sub-quanta excitation
• Authors: Jonathan D. Sterk, Henry Coakley, Joshua Goldberg, Vincent Hietala, Jason Lechtenberg, Hayden McGuinness, Daniel McMurtrey, L. Paul Parazzoli, Jay Van Der Wall, Daniel Stick
• Abstract summary: We implement a closed-loop optimization of the voltage waveforms that control the trajectory and axial frequency of an ion during transport. The resulting waveforms realize fast round-trip transport of a trapped ion across multiple electrodes at speeds of $0.5$ electrodes/$mu$s ($35 textm/s$) with a maximum of $0.36pm0.08$ quanta gain.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: 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/$\mu$s ($35 \text{m/s}$) with a maximum of $0.36\pm0.08$ 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

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