Quantum Sensing and Informatics for Quantum Transformation

The Arai group at the Tokyo Institute of Technology was established in April 2022 with the theme of quantum technology. Among the many quantum technologies, we focus on quantum sensing. By combining it with information science (informatics), we aim to create an innovation called “quantum transformation.”

東京工業大学工学院 荒井研究室は、量子技術をテーマとして2022年4月に発足した新しい研究室です。我々は、数ある量子技術のなかでも特に量子センシングに注目し、そこに情報科学(インフォマティクス)を融合することで、「量子トランスフォメーション」と呼べるようなイノベーションの創出を目指します。

Our Mission

Beyond Society 5.0/DX driven by artificial intelligence, IoT, 5G, etc., the world of Society 6.0 awaits. One of the technologies that will support this future society is “quantum,” which will advance the information processing supply chain in an integrated manner. As a result, the world is accelerating investment in quantum sensors, computers, and networks.

Among many quantum technologies, our laboratory focuses on quantum sensing and aims to create innovation called “quantum transformation” by fusing it with information science (informatics).



Research topics along quantum

Our Approach

Quantum sensing is a precise measurement of physical quantities using quantum effects such as quantum coherence and entanglement.

Among them, well-known quantum magnetic field sensors are superconducting quantum interferometers that operate at extremely low temperatures and optically pumped magnetometers that use atomic gas confined in a glass cell. We are mainly studying nitrogen-vacancy centers (NV centers) in diamond.

Furthermore, to further improve the performance of quantum sensing, we will comprehensively incorporate a wide range of informatics, from basic concepts such as statistical processing and image processing to the latest concepts such as machine learning, quantum computing, and noise theory.




Nitrogen-vacancy centers in diamond


June 2, 2023
We had a tennis tournament. Yasuko won!

June 1, 2023
Our experimental lab has been relocated to 1st floor of the G2 building.

May 8, 2023
Dr. Junghyun Lee, a senior scientist from Korea Institute of Science and Technology, visited us.

Apr 27, 2023
Our paper on “Pressure Sensor Using a Hybrid Structure of a Magnetostrictive Layer and Nitrogen-Vacancy Centers in Diamond” has been published in Physical Review Applied.

Apr 7, 2023
Keigo Arai has been awarded the MEXT Young Scientists’ Prize.

Apr 1, 2023
A warm welcome to Shuhei Ohyama, a graduate student, and Ryuki Motonaga, a undergraduate student.

March 10, 2023
We had a table tennis tournament. Eikichi won!

Jan 1, 2023
A warm welcome to Tomoki Fujii, a research assistant.

Jan 1, 2023
A warm welcome to Toyonobu Nakagawa, a technical staff.

Jan 1, 2023
A warm welcome to Yasuko Shirasu, an administrative staff.

Nov 24, 2022
Our paper on on “Controllable tunability of a Chern number within the electronic-nuclear spin system in diamond” has been posted on arXiv.

Sep 6, 2022
Our paper on High-precision robust monitoring of charge/discharge current over a wide dynamic range for electric vehicle batteries using diamond quantum sensors has been published in Scientific Reports.

Aug 23, 2022
Our paper on Millimetre-scale magnetocardiography of living rats with thoracotomy has been published in Communications Physics.

Aug 1, 2022
The Arai group has been relocated to Tokyo Institute of Technology Suzukakedai campus.

Jun 24, 2022
Congratulations to Eikichi Kimura for receiving the JGC-S scholarship.

May 1, 2022
A warm welcome to Yoshie Yanagida, an administrative staff.

Apr 4, 2022
A warm welcome to Eisuke Oba and Eikichi Kimura, undergraduate students from the Department of Electrical and Electronic Engineering.

Apr 1, 2022
The Arai group has been launched at Tokyo Institute of Technology Ookayama campus.