R&D Project

TARUCHA Seigo PM Photo

Goal 6 R&D Projects (Selected in FY2025)Development of Fault-Tolerant Silicon Quantum Computing Technologies

Project manager (PM)TARUCHA SeigoGroup Director, RIKEN Center for Emergent Matter Science / Team Director, RIKEN Center for Quantum Computing

Summary of the project

This project aims to develop scalable multi-qubit devices with error correction toward realization of fault-tolerant silicon quantum computers. We will apply qubit integration and qubit-shuttling technology to implement a unit structure of qubits and scale up the qubit devices by integrating the unit structures. We will establish technology bases appropriate to implement large-scale quantum computers by 2030, and expand them in cooperation with the semiconductor industry to realize fault-tolerant large-scale quantum computers by 2050.

Milestone by year 2030

We will develop technologies for scalability and error correction that form the foundation for the realization of large-scale quantum computers in collaboration with industry. Furthermore, we will develop scalable interconnect and packaging technologies in pure Si/SiGe, along with core qubit technologies —such as qubit control, readout, coupling via qubit transfer, and high-quality qubit transfer channels—and integrate them into a coherent system.

Milestone by year 2028

Using isotopically enriched Si/SiGe substrates, we will develop scalable multi-qubit device technologies that enable high-fidelity quantum operations, and on this basis fabricate unit structures for two-dimensional qubit arrays. Utilizing a portion of these structures, we will conduct proof-of-principle experiments on quantum error correction. In parallel, we will advance elemental qubit technologies compatible with large-scale multi-qubit integration.

Silicon quantum computing system

Silicon quantum computing system

Performers

Theme [1] NAKAJIMA Takashi RIKEN
Theme [1] MIKI Takuji Kobe University
Theme [2] MIZUNO Hiroyuki Hitachi, Ltd.
Theme [3] KODERA Tetsuo Institute of Science Tokyo
Theme [3] YONEDA Jun The University of Tokyo
Theme [3] FUJITA Takafumi The University of Osaka
Theme [3] MIYAMOTO Satoru National Institute of Advanced Industrial Science and Technology

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