A Scalable Low-Latency FPGA Architecture for Spin Qubit Control Through Direct Digital Synthesis.

Scaling qubit control is a key issue for Large Scale Quantum (LSQ) computing and hardware control systems are increasingly costly in logic and memory resources. We present a newly developed compact Direct Digital Synthesis (DDS) architecture for signal generation for spin qubits that is scalable in terms of waveform accuracy and the number of synchronized channels. Fine control of gate voltages is achieved by on-the-fly generation of very precise ramps. Embedded memory requirements are reduced by orders of magnitude compared to current Arbitrary Waveform Generator (AWG) architectures, removing a major scalability barrier for quantum computing.