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| Yasunobu Nakamura | |
|---|---|
| Name | Yasunobu Nakamura |
| Native name | 中村 靖信 |
| Birth date | 1970s |
| Birth place | Kyoto, Japan |
| Fields | Quantum information, Superconducting circuits, Quantum optics |
| Workplaces | University of Tokyo; RIKEN; National Institute of Informatics |
| Alma mater | University of Tokyo; Tokyo Institute of Technology |
| Doctoral advisor | Kazuo Nakamura |
| Known for | Circuit quantum electrodynamics, superconducting qubits, quantum limited amplifiers |
Yasunobu Nakamura is a Japanese experimental physicist known for pioneering work in superconducting quantum circuits and circuit quantum electrodynamics. He has led laboratories at RIKEN and the University of Tokyo and has collaborated with international groups at institutions such as MIT, Yale University, and NIST. Nakamura's research spans superconducting qubits, quantum measurement, and hybrid quantum systems, influencing development in quantum computing, quantum sensing, and quantum information processing.
Nakamura was born in Kyoto and educated in Japan, completing undergraduate studies at the University of Tokyo and doctoral studies at the Tokyo Institute of Technology. During his graduate training he worked on low-temperature experiments and mesoscopic physics in groups connected to Quantum Hall effect research and Josephson junction studies. His doctoral work intersected with laboratories associated with RIKEN and the National Institute of Informatics, establishing early links to Japanese and international experimental programs in condensed matter physics and solid-state physics.
Nakamura held positions at leading research centers including NEC Corporation research laboratories and later academic appointments at the University of Tokyo and collaborative posts at RIKEN. He established a group that integrated techniques from microwave engineering, cryogenics, and nanofabrication to pursue circuit implementations of quantum bits inspired by atomic physics programs at Harvard University and MIT. Collaborations and visits with teams at Yale University, University of California, Berkeley, and National Institute of Standards and Technology helped translate concepts from cavity quantum electrodynamics and trapped ion platforms into solid-state devices.
Nakamura is credited with foundational experiments in superconducting qubits and circuit quantum electrodynamics (cQED), advancing coherence and control in Cooper pair box and transmon-like architectures. His group demonstrated quantum coherent dynamics in superconducting devices that paralleled developments at IBM Research, Google Quantum AI, and D-Wave Systems in different architectures. He contributed to development of quantum-limited amplifiers based on Josephson parametric amplifier designs and explored quantum-limited measurement techniques related to work at Laboratory for Physical Sciences and CERN-linked initiatives. Nakamura's research addressed decoherence sources such as two-level systems studied by groups at University of Oxford and University of Maryland, and his work on hybrid systems connected to spin qubit and phonon research programs at Max Planck Institute for Quantum Optics and INRIM.
Nakamura has received national and international recognition including awards from Japanese scientific societies and contributions cited in prize announcements alongside recipients from Physics Nobel Prize-adjacent communities, APS (American Physical Society) medalists, and JSPS fellows. He has been invited to speak at major conferences such as the International Conference on Quantum Technologies, APS March Meeting, and Quantum Information Processing and held visiting scholar roles at institutions linked to Royal Society and European Research Council grant networks.
Nakamura authored influential papers in journals including Nature, Science, Physical Review Letters, and Nature Physics describing coherent control of superconducting qubits, quantum nondemolition measurements, and microwave quantum optics in circuits. Key topics in his publications include circuit quantum electrodynamics experiments comparable to work by Alexandre Blais and Robert J. Schoelkopf, quantum-limited amplification comparable to designs by Michel Devoret, and protocols for quantum gates connected to efforts at Yale School of Engineering. His patents address fabrication methods for superconducting devices, microwave resonator designs, and cryogenic measurement technology used in both academic and industrial quantum computing efforts.
At the University of Tokyo and affiliated institutes Nakamura supervised graduate students and postdoctoral researchers who have since joined research groups at Harvard University, Princeton University, University of California, Santa Barbara, and several corporate quantum initiatives such as Fujitsu and Hitachi. He taught courses that bridged experimental techniques from low-temperature physics to device-oriented topics similar to curricula at ETH Zurich and École Normale Supérieure programs, contributing to training in mesoscopic superconductivity and quantum information hardware.
Nakamura has participated in public lectures and policy forums alongside representatives from METI and Japan's science funding bodies like MEXT and JSPS, explaining implications of quantum technologies for industry. His group collaborated with companies and consortia in Japan and abroad, including partnerships resembling those between NTT research and academic labs, and engagements with startups in the quantum computing ecosystem analogous to Rigetti and PsiQuantum. These collaborations have targeted technology transfer, prototype quantum processors, and commercialization of superconducting quantum hardware.
Category:Japanese physicists Category:Quantum computing researchers