Quantum mechanics is the most fundamental physical law that describes objects in the microscopic world such as electrons and atoms. Quantum mechanics supports modern technology such as semiconductors, lasers, nuclear magnetic resonance, and superconductivity as their foundations. Quantum mechanics has mysterious phenomena such as superposed states and entanglement that are go beyond our everyday intuition. A quantum computer is the next generation computer that actively applies these quantum mechanical properties for computation. Since 2014, giant IT companies such as Google and IBM have been in a race to develop quantum computers, and in 2019, it was reported that a quantum computer developed by Google was faster than the state-of-the-art super-(classical)computer in certain tasks. Quantum computing research is one of the few frontiers of science and technology where cutting-edge basic research in universities and research institutes and applications and development in large companies and startups interact with each other. In our group, we are conducting research in the field of quantum computing and related subjects. F rom 2020, we are leading national flagship project on quantum computing in Japan, MEXT Q-LEAP Quantum AI Flagship Project.
Our research subjects
Our group is conducting a wide range of researches related to quantum computers and quantum information. Near the hardware side, we are working on theoretical and numerical calculations for the hardware of specific physical systems such as superconducting qubits, ion traps, and quantum optics, to design quantum computer architectures including the development of hardware control methods and their performance evaluation. We are also developing quantum computation models and quantum error correction methods to overcome noise problems, as well as quantum algorithms running on quantum computers and their applications in various fields. The interesting thing about quantum computer research in this age is that a single group like us can conduct a full-stack theoretical research on everything from architectures to applications. Our group has been collaborating with industrial companies and startups on the development and application of quantum computer software.