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

Sterk, Jonathan D.; Coakley, Henry; Goldberg, Joshua; Hietala, Vincent; Lechtenberg, Jason; McGuinness, Hayden; McMurtrey, Daniel; Parazzoli, L. Paul; Van Der Wall, Jay; Stick, Daniel

doi:10.1038/s41534-022-00579-3

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

Journal Article · Mon Jun 20 00:00:00 EDT 2022 · npj Quantum Information

DOI:https://doi.org/10.1038/s41534-022-00579-3· OSTI ID:1883190

^[1]; Coakley, Henry ^[1]; Goldberg, Joshua ^[1]; Hietala, Vincent ^[1]; Lechtenberg, Jason ^[1]; McGuinness, Hayden ^[1]; McMurtrey, Daniel ^[1]; ^[1]; Van Der Wall, Jay ^[1]; ^[1]

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

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 s) 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.

View Accepted Manuscript (DOE)

Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)

Grant/Contract Number:: NA0003525

OSTI ID:: 1883190

Report Number(s):: SAND2022-6783J; 706558

Journal Information:: npj Quantum Information, Journal Name: npj Quantum Information Journal Issue: 1 Vol. 8; ISSN 2056-6387

Publisher:: Nature Partner JournalsCopyright Statement

Country of Publication:: United States

Language:: English

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