SFQ counter-based precomputation for large-scale cryogenic VQE machines
Abstract
The variational quantum eigensolver (VQE) is a promising candidate that brings practical benefits from quantum computing. However, the required bandwidth in/out of a cryostat is a limiting factor to scale cryogenic quantum computers. We propose a tailored counter-based module with single flux quantum circuits in 4-K stage which precomputes a part of VQE calculation and reduces the amount of inter-temperature communication. The evaluation shows that our system reduces the required bandwidth by 97%, and with this drastic reduction, total power consumption is reduced by 93% in the case where 277 VQE programs are executed in parallel on a 10000-qubit machine.
- Publication:
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arXiv e-prints
- Pub Date:
- March 2024
- DOI:
- 10.48550/arXiv.2403.00363
- arXiv:
- arXiv:2403.00363
- Bibcode:
- 2024arXiv240300363U
- Keywords:
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- Quantum Physics;
- Computer Science - Hardware Architecture
- E-Print:
- 7 pages, 5 figures, 3 tables. Accepted by DAC'24 WIP poster session