FPGA-based electronic system for the control and readout of superconducting quantum processors

Area of Science:

• Quantum computing
• Electronic engineering

Background:

• Superconducting quantum circuits require advanced electronic systems for control and measurement.
• Key challenges include synchronization, low latency, and low noise in large-scale quantum processors.

Purpose of the Study:

• To present a novel FPGA-based electronic system for synchronized qubit control and measurement.
• To achieve high precision, low latency, and real-time feedback capabilities for quantum processors.

Main Methods:

• Utilized a field-programmable gate array (FPGA) with a distributed synchronous clock and trigger architecture.
• Implemented real-time digital signal processing for precise timing, arbitrary waveform generation, and qubit state discrimination.
• Designed hardware and firmware for low-latency feedback/feedforward control.

Main Results:

• Achieved synchronous qubit control with approximately 5 ps jitter.
• Reduced feedback/feedforward latency to 125 ns, below qubit decoherence times.
• Demonstrated system functionality and low-noise performance with a fluxonium quantum processor.

Conclusions:

• The developed FPGA system meets the demanding requirements for superconducting quantum circuit technology.
• Enables precise, low-latency control and real-time feedback essential for scalable quantum computing.
• Offers a robust solution for advancing quantum information processing.