Measuring silicon spin qubits with an open-source FPGA based qubit controller

Recent advancements have made solid-state spin qubits an attractive technology for quantum information science research. A major obstacle to widespread adoption is the need for accessible electronics that can provide the high-speed and low-noise signals required for coherent control with the high-channel density needed for multiqubit interactions while minimizing cost. In this talk we address this problem by demonstrating coherent control of Loss-DiVincenzo qubits using a readily available and low-cost FPGA solution running a modified version of the open-source Quantum Instrumentation Control Kit (QICK) firmware [1]. This includes a full suite of measurements including charge sensor tune-up, charge-stability diagrams, Pauli-spin blockade readout, and coherent RF control and gate operations. We outline the strengths of this platform and address some of the hardware and control requirements that are unique to solid-state spin-qubits.

[1] L. Stefanazzi et al., “The QICK (Quantum Instrumentation Control Kit): Readout and control for qubits and detectors,” Rev. Sci. Instrum. 93, 044709 (2022).