Top Qs
Timeline
Chat
Perspective

Yasunobu Nakamura

Japanese physicist From Wikipedia, the free encyclopedia

Yasunobu Nakamura
Remove ads

Yasunobu Nakamura (中村 泰信 Nakamura Yasunobu) is a Japanese physicist. He is a professor at the University of Tokyo's Research Center for Advanced Science and Technology (RCAST)[6] and the Principal Investigator of the Superconducting Quantum Electronics Research Group (SQERG) at the Center for Emergent Matter Science (CEMS) within RIKEN.[7] He has contributed primarily to the area of quantum information science,[8] particularly in superconducting quantum computing and hybrid quantum systems.[9][10][11]

Quick Facts Born, Known for ...
Remove ads

Education and early work

Summarize
Perspective

While a child, Nakamura's family moved from Osaka to Hinode, Tokyo, where he would gain his early education.[12] He obtained his Bachelor of Science (1990), Master of Science (1992), and Ph.D. (2011) degrees at the University of Tokyo. In 1999, as a researcher at NEC, Nakamura and collaborators Yuri Pashkin and Jaw-Shen Tsai demonstrated "electrical coherent control of a qubit in a solid-state electronic device"[4] and in 2001 "realized the first measurement of the Rabi oscillations associated with the transition between two Josephson levels in the Cooper pair box"[13][14] in a configuration developed by Michel Devoret and colleagues in 1998.[13][15]

In 2000, Nakamura was featured as a "Younger Scientist" by the Japan Society of Applied Physics for his work at NEC in "quantum-state control of nanoscale superconducting devices."[16] From 2001-2002, he visited the group of Hans Mooij [de] at TU Delft on a sabbatical from NEC, where he worked with Irinel Chiorescu, Kees Harmans, and Mooij to create the first flux qubit.[17][18][19] In 2003, he was named one of MIT Technology Review's top innovators under 35 years old, in which editors noted that "Nakamura and a collaborator got two qubits to interact in a manner that had been predicted but never demonstrated" at the time.[20]

Remove ads

Current work

Summarize
Perspective

As of 3 October 2016, the Japan Science and Technology Agency (科学技術振興機構) announced funding for Nakamura's work through their Exploratory Research for Advanced Technology (ERATO) program.[21] The project, entitled Macroscopic Quantum Machines,[22] seeks to dramatically improve quantum state control technology to further the field of quantum computing. Of principal focus is the development of a highly scalable platform for implementing quantum information processing techniques, as well as the creation of hybrid quantum systems which interface with microwave quantum optics. In an article in Nikkei Science [ja] in 2018, it was announced that work towards the construction of a quantum computer with 100 superconducting qubits was underway.[23] In 2019, the Japanese Ministry of Education, Culture, Sports, Science and Technology launched a quantum technology project known as QLEAP, with Nakamura as the team leader for the quantum information processing component.[24] The project aims to develop superconducting quantum computers and other quantum technologies over a ten-year period, by increasing collaboration between academia and industry.

Thumb
A flux qubit and superconducting microwave cavity form a coupled system that connects to a parametric phase-locked oscillator. In the paper "Single microwave-photon detector using an artificial Λ-type three-level system" published in Nature Communications in 2016, Nakamura and collaborators manipulated this three-level system in such a way that single photons were detected with an "efficiency of 0.66±0.06 with a low dark-count probability of 0.014±0.001 and a reset time of ~400 ns."[25]

In past years, Nakamura and collaborators have published their findings on the efficient detection of single microwave frequency photons,[25] the suppression of quasiparticles in superconducting quantum computing environments for the improvement of qubit coherence times,[26] the development of "a deterministic scheme to generate maximal entanglement between remote superconducting atoms, using a propagating microwave photon as a flying qubit",[27] and the realization of a hybrid quantum system by the strong, coherent coupling between a collective magnetic mode of a ferromagnetic sphere and a superconducting qubit.[2]

More recently, results have been published in which superconducting qubits were used to resolve quanta of magnon number states,[28][29] to create a quantitatively non-classical photon number distribution,[30] to measure fluctuations in a surface acoustic wave (SAW) resonator,[31] and to measure an itinerant microwave photon in a quantum nondemolition (QND) detection experiment.[32][33] A superconducting circuit was later used to realize information-to-work conversion by a Maxwell's demon,[34] radio waves and optical light were optomechanically coupled to surface acoustic waves,[35] and an ordered vortex lattice in a Josephson junction array was observed.[36]

Nakamura has spoken several times at quantum information science conferences and seminars, including at the University of Vienna,[37] the Institute for Theoretical Atomic Molecular and Optical Physics at Harvard University,[38][39] the National Center of Competence in Research's Quantum Science and Technology Monte Verità conference,[40] the Institute for Quantum Computing at the University of Waterloo,[41] the Institute for Molecular Engineering at the University of Chicago[42] the Institute for Quantum Optics and Quantum Information (IQOQI),[43] and the Yale Quantum Institute at Yale University.[44]

In 2020, Nakamura was named as a fellow of the American Physical Society for "the first demonstration of coherent time-dependent manipulation of superconducting qubits, and for contributions to the development of superconducting quantum circuits, microwave quantum optics, and hybrid quantum systems".[45]

Remove ads

Honors and awards

References

Loading related searches...

Wikiwand - on

Seamless Wikipedia browsing. On steroids.

Remove ads