Superconducting Quantum Electronics Joint Research Unit

Principal Investigator

PI Name Eisuke Abe
Degree D.Sci.
Title Unit Leader
Brief Resume
2006D.Sci., School of Fundamental Science and Technology, Keio University
2006Research Associate, Institute for Solid State Physics, The University of Tokyo
2010Postdoctoral Researcher, Department of Materials, University of Oxford
2011Specially-Appointed Researcher, Institute for Nano Quantum Information Electronics, The University of Tokyo
2011Visiting Scholar, Ginzton Laboratory, Stanford University (-2014)
2012Specially-Appointed Researcher, Principles of Informatics Research Division, National Institute of Informatics
2013Research Scientist, Quantum Optics Research Group, RIKEN Center for Emergent Matter Science
2014Research Scientist, Quantum Condensate Research Team, RIKEN Center for Emergent Matter Science
2015Project Senior Assistant Professor, Faculty of Science and Technology, Keio University
2016Project Associate Professor, Advanced Research Centers, Keio University
2019Unit Leader, Superconducting Quantum Electronics Joint Research Unit, RIKEN Center for Emergent Matter Science (-Present)


We develop quantum technologies based on superconducting devices, with particular emphasis on the development of multi-qubit quantum computers. We aim to implement superconducting qubits (quantum bits) and functionalities for coherent control and non-demolition measurement of quantum states via microwaves on a superconducting quantum circuit consisting of Josephson junctions, microwave transmission lines, microwave cavities, Josephson parametric amplifiers, and so on, and to bring a quantum computer that executes computations intractable with classical computers closer to reality.

Research Fields

Physics, Engineering


Superconducting circuit
Quantum computing
Quantum technology
Microwave engineering
Quantum entanglement


Quantum technologies based on microwave engineering

Quantum technologies are expected to have broad applications in the emerging fields such as “quantum computing”, “quantum network”, and “quantum sensing”. Different physical systems—superconducting circuits, electron spins in silicon, spins of nitrogen-vacancy centers in diamond—are being pursued as qubit (quantum bit) candidates for respective applications. Even so, qubit operation frequencies often fall on the gigahertz range or microwave domain, and therefore microwave engineering plays a pivotal role in qubit design, control circuitry design, pulse-shape optimization, and so on, irrespective of the physical systems being considered. We develop superconducting qubits by leveraging the knowledge and experience accumulated in other platforms such as silicon and diamond.

Inside of a dilution refrigerator in the process of wiring microwave lines


Eisuke Abe

Unit Leader eisuke.abe[at] R


2-1 Hirosawa, Wako-shi, Saitama 351-0198 Japan

TEL:+81-(0)48-462-1111 (5718)