Nobuyuki Imoto

Global quantum network

Research Director

Nobuyuki Imoto

Collaborator

Masato Koashi	Professor Graduate School of Engineering The University of Tokyo
Kiyoshi Tamaki	Professor Academic Assembly Faculty of Engineering University of Toyama
Shigehito Miki	Senior Researcher Advanced ICT Research Institute National Institute of Information and Communications Technology
Tetsuya Mukai,	Senior Research Scientist NTT Basic Research Laboratories Nippon Telegraph and Telephone Corporation

Outline

This research is aimed at demonstrating long-distance quantum communications by forming highly controllable entanglement between photons and long-life quantum memory, converting it into entanglement between distant quantum memories by optical fiber based quantum communications, and thereby carrying out advanced quantum protocols. For this purpose, we orchestrate researches that have so far been studied independently such as photon communications, physics for quantum memories, and quantum information processing. Through this research, we will bring about new technology seeds for the global quantum communications.

Masahiro Kitagawa

Hypersensitive MRI/NMR by means of Room temperature hyperpolarization and quantum Coding

Research Director

Masahiro Kitagawa

Collaborator

Yasunobu Arikawa	Associate Professor (Lecturer) Institute of Laser Engineering Osaka University
Masaki Tsukamoto	Lecturer Graduate School of Informatics Nagoya University
Yasushi Morita	Professor Faculty of Engineering Aichi Institute of Technology
Yoshichika Yoshioka	Specially Appointed Professor Graduate School of Frontier Biosciences Osaka University

Outline

This research drastically enhances the sensitivity of nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI) by means of three quantum technologies: (1) dynamic nuclear polarization using photo-excited triplet state (triplet-DNP) to polarize nuclear spins at room temperature, (2) quantum insensitive coding to suppress relaxation, (3) quantum sensitive coding to emphasize the faint signal. It enables us to visualize dynamics and metabolism of infinitesimal amount of biological molecules in vivo and brings breakthrough in life science and medicine.

Yoshiro Takahashi

Development of advanced optical lattice quantum simulator by high-level control of cold atoms

Research Director

Yoshiro Takahashi

Collaborator

Ippei Danshita

Associate Professor Faculty of Science and Engineering Kindai University

Outline

We aim at development of basic techniques of an innovative quantum simulator equipped with an individual quantum measurement and control for ultracold atoms in an optical lattice. In addition to advancing a quantum simulation technique which utilizes an ensemble measurement and control of quantum many-body system, we develop an individual quantum feedback control based on a quantum measurement of single atoms in an optical lattice. By successfully combining these two technologies, we aim at emergence of new physics of quantum state control of quantum many-body system.

Shigeki Takeuchi

Research on the efficient generation of the broadband frequency entangled photons and their applications

Research Director

Shigeki Takeuchi

Collaborator

Hisaki Oka	Professor School of Science Kitasato University
Katsuhiko Tokuda	R & D Manager Technology Research Laboratory Shimadzu Corporation
Holger・F Hofmann	Professor Graduate School of Advanced Science and Engineering Hiroshima University
Shiyoshi Yokoyama	Professor Institute for Materials Chemistry and Engineering Kyushu University

Outline

We investigate the efficient generation of the entangled photons, where photons in a pair are correlated in broadband frequency (energy). In this project, we aim to realize an efficient broadband frequency-entangled photons using waveguide type periodically polled crystals and ring resonators. We will also study the application of the entangled photons for various novel metrological applications, including quantum optical coherent tomography and time-domain spectroscopy.

Seigo Tarucha

Development of base technologies for spin based quantum computing

Research Director

Seigo Tarucha

Collaborator

Tetsuo Kodera	Associate Professor School of Engineering Tokyo Institute of Technology
Daniel Loss	Team Leader Center for Emergent Matter Science RIKEN

Outline

In this project, correlations and dynamics of coupled quantum systems will be investigated by developing sophisticated quantum state control of single-electron spins confined in electrically controllable quantum dots. In particular, development of scalable multiple quantum dot device structures, realization of multiple qubit entanglement control, improvement of qubit control fidelity to implement realistic quantum error correction, and suppression of dephasing caused by environmental noise sources will be studied to scale up towards a quantum computer.

Jaw-Shen Tsai

Photon based quantum information processing utilizing superconducting artificial atoms

Research Director

Jaw-Shen Tsai

Collaborator

Seiji Samukawa	Professor Institute of Fluid Science Tohoku University
Franco Nori	Chief Scientist Cluster for Pioneering Research RIKEN
Mutsuo Hidaka	Invited Senior Researcher Device Technology Research Institute National Institute of Advanced Industrial Science and Technology

Outline

This project tries to propose a novel quantum computing architecture and demonstrate its fundamental operation by combine the respective advantages of superconducting artificial atom and liner optics. In this innovative quantum information processing circuit, it is possible to simplify the infrastructure of the quantum computing system, at the same time, achieving a deterministic quantum information processing.