Multi-FPGA Synchronization and Data Communication for Quantum Control and Measurement

• URL: http://arxiv.org/abs/2506.09856v1
• Date: Wed, 11 Jun 2025 15:27:22 GMT
• Title: Multi-FPGA Synchronization and Data Communication for Quantum Control and Measurement
• Authors: Yilun Xu, Abhi D. Rajagopala, Neelay Fruitwala, Gang Huang,
• Abstract summary: As quantum computers grow in qubit count, classical control systems must scale.<n>Most open-source solutions are limited to single-board radio frequency system-on-chip (RFSoC)<n>We design a clock synchronization framework to distribute deterministic clock and synchronize the clock counters across multiple RFSoC boards.<n>We also develop a data communication system over a fiber link to transfer quantum measurement data amongPGAs.
• Score: 10.0838906444803
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: In the last decade, quantum computing has grown from novel physics experiments with a few qubits to commercial systems with hundreds of qubits. As quantum computers continue to grow in qubit count, the classical control systems must scale correspondingly. While a few expensive multi-board commercial solutions exist, most open-source solutions are limited to single-board radio frequency system-on-chip (RFSoC). The essential requirements for a multi-board solution are clock synchronization among multiple boards and the ability to transfer data with low latency for performing real-time feedback. In this work, we design a clock synchronization framework to distribute deterministic clock and synchronize the clock counters across multiple RFSoC boards to generate time-aligned radio frequency (RF) pulses used to control qubits. We also develop a data communication system over a fiber link to transfer quantum measurement data among multiple field-programmable gate arrays (FPGAs). This clock synchronization and data communication module has been integrated into the open-source quantum control system, QubiC, to enable the execution of quantum algorithms across multiple boards. We demonstrate the effectiveness of our design through bench tests with a room-temperature qubit readout emulator.

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