Readout of spin qubit arrays made by advanced semiconductor manufacturing

Silicon-based quantum processors can leverage advanced semiconductor processing, offering a promising path to the large qubit count required for reaching computational advantage. High-fidelity quantum state readout is a core element of a quantum processor and requires carefully designed cryogenic readout circuits and has been demonstrated using both cryo-amplifier circuits and radio-frequency reflectometry techniques. In this talk, we discuss our current approach for readout of our 12-quantum dot array Tunnel Falls chip with onboard HBT-based cryo-amplifiers enabling high-fidelity Pauli-spin-blockade readout. We then detail progress towards scaling and improving readout to larger arrays and benchmarking different readout approaches.