3D-integrated 25-qubit quantum annealing processor with high coherence, individualized control, and modular architecture. Part 1: design.

S Novikov, R Murray, E Leonard… - APS March Meeting …, 2021 - ui.adsabs.harvard.edu
We have designed, fabricated, and measured an advanced quantum annealing processor
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 …

3D-integrated 25-qubit quantum annealing processor with high coherence, individualized control, and modular architecture. Part 2: characterization.

J Basham, J Grover, S Disseler… - APS March Meeting …, 2021 - ui.adsabs.harvard.edu
We have designed, fabricated, and measured an advanced quantum annealing processor
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 …
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