NTT and OptQC (Toshima-ku, Tokyo; President Hiroshi Takase) have signed a collaboration agreement to realize scalable and reliable optical quantum computers.
The agreement aims to apply optical communications technologies such as optical amplification and optical multiplexing to optical quantum computers to ensure the scalability and reliability essential for the practical application of optical quantum computers, thereby accelerating the practical application of optical quantum computers that will contribute to solving large-scale, complex social issues.
NTT’s optical communications technology and OptQC’s optical quantum computer development technology will be combined to develop a scalable, reliable, and practical optical quantum computer.
Specifically, the goal is to achieve scalability of one million qubits, an indicator of the practicality of quantum computers, and to establish error-tolerance technology to ensure reliability by 2030.
NTT President Shimada Akira said, “Optical quantum computers will enable us to complete calculations to solve global-scale problems in just a few days. If we can achieve 100 million qubits, it will be possible to solve highly difficult problems tailored to each individual, such as personalizing new medicines.”
NTT has been researching and developing optical technology for 60 years. It is known that some of this technology can be applied to the quantum field. For example, by 2024, they will have applied optical amplification technology to create a quantum light source that can generate quanta at 1,000 times the speed of conventional technologies.

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