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Component test toward single-flux-quantum processors

Masamitsu Tanaka, Takaharu Kondo, A. Sekiya +6 more

Physica C SuperconductivityApr 7, 200311 citations

Design of Synchronous Registers and an ALU toward Single Flux Quantum Processors

Masamitsu Tanaka, Toshiaki Kondo, A. Sekiya +4 more

Proceedings of the Society Conference of IEICEAug 20, 20020 citations

Bit-Serial Single Flux Quantum Microprocessor CORE

Akira Fujimaki, Masamitsu Tanaka, Takahiro Yamada +3 more

We describe the development of single-flux-quantum (SFQ) microprocessors and the related technologies such as designing, circuit architecture, microarchitecture, etc. Since the microprocessors studied here aim for a general-purpose computing system, we employ the complexity-reduced (CORE) architecture in which the high-speed nature of the SFQ circuits is used not for increasing processor performance but for reducing the circuit complexity. The bit-serial processing is the most suitable way to realize the CORE architecture. We assembled all the best technologies concerning SFQ integrated circuits and designed the SFQ microprocessors, CORE1α, CORE1β, and CORE1γ. The CORE1β was made up of about 11000 Josephson junctions and successfully demonstrated. The peak performance reached 1400 million operations per second with a power consumption of 3.4mW. We showed that the SFQ microprocessors had an advantage in a performance density to semiconductor's ones, which lead to the potential for constructing a high performance SFQ-circuit-based computing system.We describe the development of single-flux-quantum (SFQ) microprocessors and the related technologies such as designing, circuit architecture, microarchitecture, etc. Since the microprocessors studied here aim for a general-purpose computing system, we employ the complexity-reduced (CORE) architecture in which the high-speed nature of the SFQ circuits is used not for increasing processor performance but for reducing the circuit complexity. The bit-serial processing is the most suitable way to realize the CORE architecture. We assembled all the best technologies concerning SFQ integrated circuits and designed the SFQ microprocessors, CORE1α, CORE1β, and CORE1γ. The CORE1β was made up of about 11000 Josephson junctions and successfully demonstrated. The peak performance reached 1400 million operations per second with a power consumption of 3.4mW. We showed that the SFQ microprocessors had an advantage in a performance density to semiconductor's ones, which lead to the potential for constructing a high performance SFQ-circuit-based computing system.

IEICE Transactions on ElectronicsMar 1, 200897 citations

A Microarchitecture for a Superconducting Quantum Processor

Xiang Fu, Michiel Adriaan Rol, Cornelis Christiaan Bultink +10 more

This article proposes a quantum microarchitecture, QuMA. Flexible programmability of a quantum processor is achieved by multilevel instructions decoding, abstracting analog control into digital control, and translating instruction execution with non-deterministic timing into event trigger with precise timing. QuMA is validated by several single-qubit experiments on a superconducting qubit.

IEEE MicroMay 1, 201837 citations

Scalable architecture for next generation superconducting quantum processors

Joseph Suttle, Neereja Sundaresan, Srikanth J. Srinivasan +10 more

Bulletin of the American Physical SocietyMar 15, 20210 citations

Toward an ultra-high fidelity and scalable fluxonium quantum processor

Hsiang‐Sheng Ku, Hao Deng, Dawei Ding +22 more

Bulletin of the American Physical SocietyMar 17, 20210 citations

Exploring Microarchitecture for Next Generation Single-Flux-Quantum Processors

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