Inter-temperature Bandwidth Reduction in Cryogenic QAOA Machines

• URL: http://arxiv.org/abs/2310.01630v1
• Date: Mon, 2 Oct 2023 20:51:53 GMT
• Title: Inter-temperature Bandwidth Reduction in Cryogenic QAOA Machines
• Authors: Yosuke Ueno, Yuna Tomida, Teruo Tanimoto, Masamitsu Tanaka, Yutaka Tabuchi, Koji Inoue, Hiroshi Nakamura
• Abstract summary: The bandwidth limit between cryogenic and room-temperature environments is a critical bottleneck in superconducting quantum computers. This paper presents the first trial of algorithm-aware system-level optimization to solve this issue.
• Score: 3.1758429733939253
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The bandwidth limit between cryogenic and room-temperature environments is a critical bottleneck in superconducting noisy intermediate-scale quantum computers. This paper presents the first trial of algorithm-aware system-level optimization to solve this issue by targeting the quantum approximate optimization algorithm. Our counter-based cryogenic architecture using single-flux quantum logic shows exponential bandwidth reduction and decreases heat inflow and peripheral power consumption of inter-temperature cables, which contributes to the scalability of superconducting quantum computers.

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