Summary of the project

This R&D project will develop quantum network technologies to connect and scale up quantum computers on a small/medium scale, which are not large enough to realize a fault-tolerant universal quantum computer on their own. At the same time, we are conducting research to enable the implementation of any quantum algorithm, including distributed quantum computing by networking, and simultaneously solving the cybersecurity attacks manifested by “fault-tolerant universal quantum computers.” Based on current technology, the hardware candidates for quantum computers include superconducting, optical, atom/ion, and semiconductor physical systems. We plan to realize a large-scale networked quantum computer and implement the quantum protocols by connecting these quantum computers in a network.

Milestone by year 2030

We will realize networked quantum computers on a large-scale enabling quantum error correction by connecting modular quantum computers on a small/medium scale. We will demonstrate quantum protocols with distributed quantum computers connected to the quantum internet.

Milestone by year 2025

To show that the number of qubits can be expanded to the scale required for error correction, we will demonstrate network connections between distant qubits or quantum memories. Fundamental remote quantum protocols will be demonstrated.

R&D theme progress reports

• 1. Atom networking technology
• 2. Photon networking technology
• 3. Semiconductor networking technology
• 4. Superconducting networking technology

Performers

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• Summary of the project (145KB)
• Progress Report (Download all) (691KB)