List of R & D issues

Research and Development Subjects04
Research and development on social implementation of an optical quantum computer

Outline of Research and Development Proposals

The main objective of this project is to achieve the social implementation of optical quantum computers, and to promote the construction of a man-machine interface that includes the development of compilers and assemblers, as well as the realization of actual hardware that can be operated as a cloud computer. The goal is to build a system for large-scale general-purpose quantum computation, simulate optical quantum operations, and finish cloud computing with optical fibers and optical waveguides into an optical quantum information processing system that can operate stably 24 hours a day, 365 days a year with almost no manual optical axis adjustment or maintenance. When we achieve this, we will be able to show that we can use light quanta to do things that are equivalent to or better than the devices operating as quantum computers in Japan and abroad, and this is expected to be a major step forward in future research and development.

04Research and development on social implementation of an optical quantum computer
Professor,Akira Furusawa, Graduate School of Engineering, The University of Tokyo
Project Promoters
Akira FurusawaProfessor,
Graduate School of Engineering,
The University of Tokyo

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Research and Development Subjects01
Research and development on time-domain multiplexed general-purpose optical quantum computer

We will study and develop a hybrid error correction method with continuous quantity error correction using a state called GKP qubit, which is expected to be a low threshold for error tolerance.

Research and Development Subjects02
Research and development on superconducting photon number discriminator

We will develop a superconducter photon number discriminator that can discriminate more than 60 photons with an operating bandwidth of 1 GHz and a quantum efficiency of more than 99%.

Research and Development Subjects03
Research and development on waveguide optical parametric amplifiers and optical quantum waveguide circuits


We aim to realize waveguide optical parametric amplifiers and optical quantum waveguide circuit devices in order to realize quantum teleportation chips that can operate satisfactorily even in conditions exceeding the error tolerance threshold.

Research and Development Subjects04
Research and development on social implementation of optical quantum computers

The main objective of this project is to build a man-machine interface that includes the development of compilers and assemblers, and to realize an actual machine that can be operated as a cloud computer.

  • The Moonshot Research and Development Program
  • Japan Science and Technology Agency
  • The University of Tokyo
  • Institute of Engineering Innovation,School of Engineering, the University of Tokyo
  • RIKEN Center for Quantum Computing
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