Cryogenic Time-Division-Multiplexed Voltage Control for Scalable Trapped-Ion Quantum Processors

• URL: http://arxiv.org/abs/2605.17824v1
• Date: Mon, 18 May 2026 03:56:59 GMT
• Title: Cryogenic Time-Division-Multiplexed Voltage Control for Scalable Trapped-Ion Quantum Processors
• Abstract summary: Trapped-ion quantum computers require on the order of ten trap electrodes per qubit.<n>Time-division multiplexed (TDM)-based voltage control for trap electrodes provides a natural route to alleviate this constraint.<n>We develop and cryogenically validate TDM-based voltage control schemes for two distinct electrode classes.
• Score: 0.29316801942271303
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Trapped-ion quantum computers based on the quantum charge-coupled device architecture require on the order of ten trap electrodes per qubit, making the number of vacuum feedthroughs a bottleneck at the system scale. Time-division multiplexed (TDM)-based voltage control for trap electrodes provides a natural route to alleviate this constraint. However, previous studies have been limited to architectural proposals for static trap-potential compensation and room-temperature demonstrations of dynamic-electrode control, leaving cryogenic operation of TDM-based voltage control for static and dynamic electrodes experimentally unexplored. In this study, we develop and cryogenically validate TDM-based voltage control schemes for two distinct electrode classes. For static electrodes used in trap-potential compensation, we implement a 32-channel demultiplexed system operating at approximately 27~K, achieving an effective voltage update rate of 37.5~kHz with an output range of $\pm10~\mathrm{V}$ per channel. For dynamic electrodes used in ion operations, such as shuttling, we implement a four-channel demultiplexed system operating at approximately 14~K, achieving an effective voltage update rate of 1~MHz with a comparable output range. These results establish TDM-based voltage control as a practical approach for both electrode classes, providing a path for mitigating the vacuum feedthrough bottleneck in scalable trapped-ion quantum processors.

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