[Quantum frontiers] Year Started : 2023

Masahito Ueda

Hybrid Quantum Physics based on Levitated Nanoparticles

Grant No.:JPMJCR23I1
Research Director
Masahito Ueda

Professor
School of Science
The University of Tokyo

Collaborator
Kiyotaka Aikawa Associate professor
Graduate school of Science
The University of Tokyo
Outline

A theoretical group and an experimental group closely collaborate to develop a new research platform on artificial superatom. Specifically, we carry our the following three research subjects. (1) We establish the trajectory-based understanding on cooling and thermalization of nanoparticles. (2) We develop a method of optically identifying atomic ions near a nanoparticle. (3) We create a superatom in which an atomic ion is bound by a charged nanoparticle.

Kensuke Kobayashi

Exploring Physical Properties under Extreme Conditions by Quantum Spin Microscopy

Grant No.:JPMJCR23I2
Research Director
Kensuke Kobayashi

Professor
Graduate School of Science
The University of Tokyo

Collaborator
Yuto Ashida Associate Professor
Graduate School of Science
The University of Tokyo
Katsuya Shimizu Professor
Graduate School of Engineering Science
Osaka University
Outline

This study aims to explore physical properties under extreme conditions by precise local magnetic field measurement using a quantum spin microscope with quantum sensors. Using color centers such as diamond nitrogen-vacancy centers as quantum sensors, we will establish the material basis and protocols for quantum sensing, which will be applied to exploring physical properties under extreme conditions. We will tackle issues such as the quantitative observation of ultrathin mesoscopic magnets and the visualization of superconductivity under high pressure. Our challenges will open up the future of quantum spin microscopy as a usable quantum technology.

Yoshiro Takahashi

Searching for new physics with precision quantum measurement of ultracold atoms

Grant No.:JPMJCR23I3
Research Director
Yoshiro Takahashi

Professor
Graduate School of Science
Kyoto University

Collaborator
Ryuji Takagi Associate Professor
Graduate School of Arts and Sciences
The University of Tokyo
Osamu Tajima Professor
Graduate School of Science
Kyoto University
Outline

Using optical tweezer arrays and optical lattices, which have recently attracted attention as a new experimental platform for ultracold neutral atoms, we develop ultra-precise quantum measurement techniques. In particular, we develop unique approaches by making the most of the novel properties of the ytterbium atoms. We apply them for the search for new physics beyond the Standard Model of particle physics such as the test of fundamental symmetry and dark-matter search, as well as for the development of a new scheme of quantum computing.

Yuuki Tokunaga

Co-creative multi-layer design of distributed quantum computing and its implementation

Grant No.:JPMJCR23I4
Research Director
Yuuki Tokunaga

Distinguished Researcher
Computer and Data Science Laboratories
Nippon Telegraph and Telephone Corporation

Collaborator
Teruo Tanimoto Associate Professor
Faculty of Information Science and Electrical Engineering
Kyushu University
Kohei Matsuura Assistant Professor
School of Engineering
The University of Tokyo
Nobuyuki Yoshioka Research Associate
Graduate School of Engineering
The University of Tokyo
Outline

Toward the realization of a large-scale distributed quantum computing, this project aims for an unprecedented and co-creative multi-layer design throughout hardware, architecture, and software. A platform of distributed quantum computers will be established by constructing a framework to exploit the potential performance of distributed quantum computation while tackling theory and experiment simultaneously.

Norikazu Mizuochi

Development of a high-sensitive quantum sensing microscope for elucidating biological phenomena

Grant No.:JPMJCR23I5
Research Director
Norikazu Mizuochi

Professor
Institute for Chemical Research
Kyoto University

Collaborator
Izuru Ohki Associate Professor
Institute for Chemical Research
Kyoto University
Hidehito Tochio Professor
Graduate School of Science
Kyoto University
Yuichiro Matsuzaki Associate Professor
Faculty of Science and Engineering
Chuo University
Outline

In this research, we utilize a quantum sensor based on NV centers in diamond. We combine quantum and classical technologies such as sophisticated control of quantum states, high-sensitivity quantum sensing measurements, signal intensity amplification by highly polarized nuclear spin, and production of high-quality diamonds. We will develop a quantum sensing microscope that exceeds the sensitivity and spatial resolution of reported ones using NV centers. Furthermore, we aim to realize the measurement of dynamic interaction networks of biopolymers, such as proteins within cells.

Nobuhiro Yanai

Quantum medical diagnostics based on the creation of spin hyperpolarization materials

Grant No.:JPMJCR23I6
Research Director
Nobuhiro Yanai

Associate Professor
Graduate School of Engineering
Kyushu University

Collaborator
Yuki Kurashige Associate Professor
Graduate School of Science
Kyoto University
Yasuhiro Kobori Professor
Molecular Photoscience Research Center
Kobe University
Fuminori Hyodo Professor
Graduate School of Medicine
Gifu University
Outline

Magnetic resonance imaging (MRI) have the intrinsic problem of poor sensitivity due to low nuclear spin polarization. This research aims to develop a new quantum medical diagnostic technology by creating spin hyperpolarized materials that dramatically improve the sensitivity of MRI. We will also develop unique molecular quantum sensors to enable quantum sensing of diverse chemical parameters.

Kaoru Yamanouchi

Qudit-boson quantum-operation realization by trapped ions

Grant No.:JPMJCR23I7
Research Director
Kaoru Yamanouchi

Project Professor
Institute for Attosecond Laser Facility
The University of Tokyo

Collaborator
Tomoya Okino Researcher
TRIP Headquarters
RIKEN
Yutaka Tachikawa Group Manager
R&D Management Unit
DIC Corporation
Outline

We will develop a trapped-ion type quantum computer by taking advantage of multiple electronic states (qudit) and vibrational modes (boson) characteristic of a trapped atomic-ion system. By performing quantum gate operation and error mitigation based on quantum algorithms for the qudit and bosonic systems, we will explore frontiers in quantum computing by a trapped-ion quantum computer. We will further develop a molecular simulator to investigate non-adiabatic transitions in molecules and coupled oscillators using the qudit-boson hybrid system.

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