Development of Integration Technologies for Superconducting Quantum Circuits

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ABOUT

MOONSHOT

In this project, we aim to develop designing and manufacturing technologies of devices and equipment, which are necessary to realize the goal of the Moonshot program #6: realize a fault-tolerant universal quantum computer by 2050 that can solve problems which conventional computers cannot solve on a realistic timescale.

More specifically, in order to fully utilize a quantum bit (qubit) consisting of a superconducting circuit, we are going to establish technique of connecting qubit chips located at extremely low temperature and electronics equipment controlling them, improve quality of the qubit chip itself, and develop novel superconducting qubit chips which can be more easily handled.

What is a quantum computer?
In conventional computers, information is expressed as multiple bits, each of which stores 0 or 1 (classical bit). Then calculation is performed by logic gate operation on these classical bits. In quantum computers on the other hand, by using a so-called quantum superposition of 0 and 1 states (qubit), quantum logic gate operations on these qubits has effectively the same effect as if the parallel classical computation were performed simultaneously. So, the quantum computer can solve a kind of problems that conventional computers cannot solve on a realistic timescale. The quantum computer is considered to be suitable for dealing with complex and large-scale problems, such as actual natural and social phenomena.
Application of a quantum computer
For example, realizing phenomena occurred in nature or inside living organism by using heat or electricity requires a tremendous amount of energy. A quantum computer can be useful for understanding the mechanism of photosynthesis or developing innovative materials which can serve to reduce energy consumption, which eventually leads to realize an energy-saving sustainable society.
What is a superconducting qubit?
By lowering temperature of a specific metal or compound below a threshold called critical temperature, electrical resistance suddenly vanishes. This phenomenon is called superconductivity. A closed loop consisting of superconductor can maintain a current flow persistently thanks to its zero resistivity. By taking advantage of this phenomenon, a qubit chip can be made of a superconductor, where energy or information can be controlled by applying a magnetic/electric field.

MESSAGE

Recently, there have been world-wide intense research activities to develop superconducting quantum computer.

Towards the realization of practical fault-tolerant quantum computer beyond the NISQ machine, we still need lots of breakthroughs for the integration of the superconducting circuit.

The required technologies are related not only to the qubit device itself,but also to its peripherals such as control electronics, packaging, and refrigerator.

In this project, through the collaboration among groups with different expertises, those technologies are developed and optimized for the total system of future quantum computer.

Tsuyoshi Yamamoto

Project Manager

System Platform Research Laboratories, NEC Corporation
Research Fellow

ORGANIZATION

組織図

Development of Integration Technologies for Superconducting Quantum Circuits Project Management Office

1-1-1 Umezono, Tsukuba, Ibaraki 305-8568 Japan
NEC-AIST Quantum Technology Cooperative Research Laboratory, AIST Tsukuba Central 2

MEMBER

Tsuyoshi Yamamoto
Improved superconducting qubit coherence

Tsuyoshi Yamamoto

System Platform Research Laboratories, NEC Corporation

Research Fellow

Kunihiro Inomata
Improved superconducting qubit coherence

Kunihiro Inomata

Research Center for Emerging Computing Technologies, Advanced Industrial Science and Technology

Senior Researcher

Kazuki Koshino
Improved superconducting qubit coherence

Kazuki Koshino

College of Liberal Arts and Sciences, Tokyo Medical and Dental University

Associate Professor

Fumiki Yoshihara
Developing qubit based on epitaxial junction

Fumiki Yoshihara

Advanced ICT Research Institute, National Institute of Information and Communications Technology

Senior Researcher

Masayuki Shirane

Masayuki Shirane

System Platform Research Laboratories, NEC Corporation

Senior Manager

Yuichi Igarashi

Yuichi Igarashi

System Platform Research Laboratories, NEC Corporation

Manager

佐藤哲朗

Tetsuro Sato

System Platform Research Laboratories, NEC Corporation

Principal Researcher

山口愛子

Aiko Yamaguchi

System Platform Research Laboratories, NEC Corporation

Staff

山道智博

Tomohiro Yamaji

System Platform Research Laboratories, NEC Corporation

Assistant Manager

森岡あゆ香

Ayuka Morioka

System Platform Research Laboratories, NEC Corporation

Assistant Manager

北川佳廣

Yoshihiro Kitagawa

System Platform Research Laboratories, NEC Corporation

Staff

橋本義仁

Yoshihito Hashimoto

System Platform Research Laboratories, NEC Corporation

Expert

Shun Yanai

Shun Yanai

System Platform Research Laboratories, NEC Corporation

Assistant Manager

Yohei Kawakami

Yohei Kawakami

System Platform Research Laboratories, NEC Corporation

Staff

Shimpei Goto

Shimpei Goto

College of Liberal Arts and Sciences, Tokyo Medical and Dental University

Project Assistant Professor

Kouichi Semba

Kouichi Semba

Advanced ICT Research Institute, National Institute of Information and Communications Technology

Executive Researcher

Hirotaka Terai

Hirotaka Terai

Advanced ICT Research Institute, National Institute of Information and Communications Technology

Executive Researcher

Tomoko Fuse

Tomoko Fuse

Advanced ICT Research Institute, National Institute of Information and Communications Technology

Senior Researcher

Sunmi Kim

Sunmi Kim

Advanced ICT Research Institute, National Institute of Information and Communications Technology

Researcher

Qiu,Wei

Qiu,Wei

Advanced ICT Research Institute, Frontier Research Laboratory, National Institute of Information and Communications Technology

Senior Researcher

Sahel Ashhab

Sahel Ashhab

Advanced ICT Research Institute, National Institute of Information and Communications Technology

Executive Researcher

瀬戸浦 真衣

Mai Setoura

Advanced ICT Research Institute, National Institute of Information and Communications Technology

Technical Researcher

Masamitsu Tanaka
Developing qubit based on epitaxial junction

Masamitsu Tanaka

Graduate School of Engineering, Nagoya University

Assistant Professor

Satoru Odate
Developing qubit fabrication process with high throughput and uniformity

Satoru Odate

Optical Research Laboratory, Research & Development Division, Nikon Corporation

Technical Expert

Shiro Saito
Developing bosonic code using superconducting resonator

Shiro Saito

NTT Basic Research Laboratories

Distinguished Researcher

Atsushi Noguchi
Developing bosonic code using superconducting resonator

Atsushi Noguchi

RIKEN

Team Leader

Taro Yamashita

Taro Yamashita

Graduate School of Engineering, Nagoya University

Associate Professor

Hiroyuki Tsukamoto

Hiroyuki Tsukamoto

Optical Research Laboratory, Research & Development Division, Nikon Corporation

Section Manager

Hajime Aoyama

Hajime Aoyama

Business Planning Department, Semiconductor Lithography Business Unit, Nikon Corporation

Technical Expert

Naooki Saito

Naooki Saito

Optical Research Laboratory, Research & Development Division, Nikon Corporation

Chief Researcher

Imran Mahboob

Imran Mahboob

NTT Basic Research Laboratories

Distinguished Researcher

Kosuke Kakuyanagi

Kosuke Kakuyanagi

NTT Basic Research Laboratories

Senior Research Scientist

Hiraku Toida

Hiraku Toida

NTT Basic Research Laboratories

Research Scientist

Takaaki Takenaka

Takaaki Takenaka

NTT Basic Research Laboratories

Scientist

Leonid Abdurakhimov

Leonid Abdurakhimov

NTT Basic Research Laboratories

Research Specialist

Kosuke Mizuno

Kosuke Mizuno

NTT Basic Research Laboratories

Scientist

Taishi Kawabata

Taishi Kawabata

NTT Basic Research Laboratories

Technical Staff

Shotaro Shirai

Shotaro Shirai

RIKEN Center for Quantum Computing

Research Fellow

Ryo Maekura

Ryo Maekura

RIKEN Center for Quantum Computing

Research Fellow

Yuta Ohkubo

Yuta Ohkubo

RIKEN Center for Quantum Computing

Research Fellow

Jaw Shen Tsai
Developing bosonic code using superconducting resonator

Jaw Shen Tsai

Tokyo University of Science, Department of Physics

Professor

Shinichi Yorozu
Design and manufacture of hybrid chips for qubits and peripheral electronics

Shinichi Yorozu

RIKEN Center for Quantum Computing

Deputy Director

Masamichi Saitoh
Development of refrigeration system specialized in quantum computing

Masamichi Saitoh

ULVAC CRYOGENICS INCORPORATED

Manager

Yuya Fujiwara
Development of refrigeration system specialized in quantum computing

Yuya Fujiwara

ULVAC, Inc. Components Division

Hideaki Takayanagi

Hideaki Takayanagi

Tokyo University of Science

Vice President

Shohei Watabe

Shohei Watabe

Tokyo University of Science, Department of Physics

Junior Associate Professor

Yoichiro Hashizume

Yoichiro Hashizume

Tokyo University of Science, Department of Applied Physics

Junior Associate Professor

Yutaka Tabuchi

Yutaka Tabuchi

RIKEN Center for Quantum Computing

Unit Leader

Alexander Badrutdinov

Alexander Badrutdinov

RIKEN Center for Quantum Computing

Research Scientist

koichi Kusuyama

koichi Kusuyama

RIKEN Center for Quantum Computing

Technical Staff I

Kohichi Nittoh

Kohichi Nittoh

RIKEN Center for Quantum Computing

Technical Staff I

Shuhei Tamate

Shuhei Tamate

RIKEN Center for Quantum Computing

Visiting Scientist

Bunpei Masaoka

Bunpei Masaoka

RIKEN Center for Quantum Computing

Technical Staff

Miyuki Ozawa

Miyuki Ozawa

RIKEN Center for Quantum Computing

Technical Staff

Youiti Ootuka

Youiti Ootuka

ULVAC CRYOGENICS INCORPORATED

Technical Advisor

Professor Emeritus at University of Tsukuba

Atsushi Morihira

Atsushi Morihira

ULVAC, Inc. Components Division

Yoshinori Uzawa
Development of low noise microwave amplifier using superconductor-insulator-superconductor (SIS) mixer

Yoshinori Uzawa

Advanced Technology Center, National Astronomical Observatory of Japan

Professor

Akira Kawakami
Development of low noise microwave amplifier using superconductor-insulator-superconductor (SIS) mixer

Akira Kawakami

Advanced ICT Research Institute, National Institute of Information and Communications Technology

Senior Researcher

Masamitsu Tanaka
Study of single flux quantum circuits for control and readout of qubit

Masamitsu Tanaka

Graduate School of Engineering, Nagoya University

Assistant Professor

Munehiro Tada
Developing LSI working in low temperature for qubit control and readout

Munehiro Tada

NanoBridge Semiconductor, Inc.

Director and VP of Engineering

Takafumi Kojima

Takafumi Kojima

Advanced Technology Center, National Astronomical Observatory of Japan

Associate Professor

Kazumasa Makise

Kazumasa Makise

Advanced Technology Center, National Astronomical Observatory of Japan

Associate Professor

National Institute of Advanced Industrial Science and Technology

Cross-appointment fellow

Wenlei Shan

Wenlei Shan

Advanced Technology Center, National Astronomical Observatory of Japan

Associate Professor

Ikki Nagaoka

Ikki Nagaoka

Graduate School of Engineering, Nagoya University

Graduate Student

Yuto Takeshita

Yuto Takeshita

Graduate School of Engineering, Nagoya University

Graduate Student

Masayuki Higashi

Masayuki Higashi

Graduate School of Engineering, Nagoya University

Graduate Student

Manami Kuniyoshi

Manami Kuniyoshi

Graduate School of Engineering, Nagoya University

Graduate Student

Toshitsugu Sakamoto

Toshitsugu Sakamoto

NanoBridge Semiconductor, Inc.

Director and CTO

Makoto Miyamura

Makoto Miyamura

NanoBridge Semiconductor, Inc.

Principal Researcher

Koichiro Okamoto

Koichiro Okamoto

NanoBridge Semiconductor, Inc.

Assistant Manager

Ken Uchida
Developing LSI working in low temperature for qubit control and readout

Ken Uchida

Department of Materials Engineering, The University of Tokyo

Professor

Hiroki Ishikuro
Developing LSI working in low temperature for qubit control and readout

Hiroki Ishikuro

Faculty of Science and Technology, Keio University

Professor

Makoto Negoro
Study of digital maicrowave electronics for controlling superconducting quantum computing

Makoto Negoro

QIQB center, OTRI, Osaka University

Specially appointed associate professor

No photo

Takahisa Tanaka

Department of Materials Engineering, The University of Tokyo

Assistant Professor

No photo

Taro Kato

Department of Materials Engineering, The University of Tokyo

Graduate Student

No photo

Tomohisa Miyao

Faculty of Engineering, The University of Tokyo

Student

No photo

Chika Kijima

Faculty of Science and Technology, Keio University

Rsearch Assistant

No photo

Shuya Nakagawa

Faculty of Science and Technology, Keio University

Graduate Student

No photo

Yohsuke Shiiki

Faculty of Science and Technology, Keio University

Graduate Student

No photo

Hiroki Ojima

Faculty of Science and Technology, Keio University

Graduate Student

No photo

Masayuki Ichikawa

Faculty of Science and Technology, Keio University

Graduate Student

Kentaro Yoshioka

Kentaro Yoshioka

Faculty of Science and Technology, Keio University

Assistant Professor

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