comprised of 25 capacitively-shunted flux qubits (CSFQs) connected by 40 rf-SQUID tunable
couplers. Each CSFQ features state-of-the-art persistent current readout (https://arxiv.
org/abs/2006.10817). Over 200 dedicated bias lines enable unprecedented control over
annealing schedules. To achieve the required scale and signal density while maintaining
high coherence, we leverage MIT Lincoln Laboratory's 3-tier stack fabrication and 3D …