A FPGA based qubit control system is developed to demonstrate the functionality and scalability for the superconducting qubit control. The system requires technology and engineering from RF circuits development, FPGA gateware development, structure and thermal engineering, python API and GUI development to quantum gate analysis.
Based on the Rev 1 prototype hardware, we implemented single qubit characterization and gate optimization protocol. The test on the superconducting qubit demonstrated comparable gate fidelity (99.7%) with the commercial AWG etc. Fast reset feature has been implemented in gateware level to achieve low latency. We are working on optimizing a two-qubit gate and measuring its fidelity. The web based GUI is under development to improve the user experience.
Looking forward, we expect to continue upgrading the gateware and hardware to reflect the new feature requirement and lesson learned from the experiment experience. In particular, we will develop the fiber based synchronization among FPGAs, explore low latency DAC and RFSoC solutions.