\nYou can explore our latest research outcomes and activities in the following sections: News<\/a>, Publications<\/a>, and Research<\/a>.<\/p>\n
Our Research<\/h3>\n
Diamond is known as the hardest gemstone, but when doped with impurities and heat-treated, it transforms into the most robust quantum memory, capable of preserving quantum states for seconds. For example, when nitrogen is introduced, it forms a nitrogen-vacancy (NV) center, a type of color center. Surrounding these centers are numerous carbon isotopes with spin, which serve as quantum memories lasting for minutes.<\/p>\n
By using such ensembles of quantum memories within diamonds, we can realize phenomena known as quantum teleportation, something that once seemed like science fiction.
\nBuilding on this principle, our team has successfully demonstrated quantum repeaters, the core component of a future quantum internet, and continues advancing research toward that ambitious goal.<\/p>\n
Message from Professor Hideo Kosaka<\/h3>\n\n![\"Professor](\"https:\/\/kosaka-lab.ynu.ac.jp\/japanese\/wp-content\/uploads\/2022\/08\/photo-kosaka-001.jpg\")
<\/div>\n\nAt our lab, we are working toward realizing quantum computers and quantum networks by developing quantum interfaces and quantum repeaters.
\nThese goals are defined by projects and carried out through the Quantum Information Research Center (QIC) at Yokohama National University, where I serve as director. Through QIC, we collaborate with leading researchers from Japan and abroad.<\/p>\n
Our students and researchers are encouraged to pursue diverse career paths while tackling fascinating scientific challenges that aim to bring innovation to future society.<\/p>\n
If you are interested in quantum technology, we welcome you to join our activities.
\nWe are also open to discussions on research collaboration and project proposals.<\/p>\n<\/div>\n<\/div>\n
Ongoing Projects<\/h3>\n\n\n<\/p>\n
\n![\"Moonshot](\"https:\/\/kosaka-lab.ynu.ac.jp\/japanese\/wp-content\/uploads\/2022\/08\/logo-quint.png\")
<\/a>
\nCabinet Office Moonshot Research and Development Program – Goal 6<\/strong><\/p>\nDevelopment of Quantum Interfaces for Building Quantum Computer Networks<\/p>\n
Project period: FY2020\u2013FY2025<\/p>\n<\/div>\n
<\/p>\n
\n![\"Ministry](\"https:\/\/kosaka-lab.ynu.ac.jp\/japanese\/wp-content\/uploads\/2022\/08\/soumusyou-logo.jpg\")
<\/a>
\nthe Ministry of Internal Affairs and Communications
\n<\/strong><\/p>\nResearch and Development of Key Technologies for Realizing the Quantum Internet<\/p>\n
Project period: FY2023\u2013FY2027<\/p>\n<\/div>\n
<\/p>\n
\n![\"ASPIRE](\"https:\/\/kosaka-lab.ynu.ac.jp\/japanese\/wp-content\/uploads\/2025\/02\/Aspire.png\")
<\/a> <\/p>\nJST ASPIRE Program<\/strong><\/p>\n
\n<\/strong>Japan-Germany Quantum Technologies Joint Research Project<\/p>\nProject period: FY2025\u2013FY2029<\/p>\n<\/div>\n<\/div>\n<\/div>\n
Lab History<\/h3>\n\n- \n2025\/06<\/div>\nQIC signs collaboration agreement with AIST G-QuAT to promote the social implementation of quantum technologies
![\"\"](\"https:\/\/www.ynu.ac.jp\/hus\/koho\/33629\/34_33629_1_13_250609070656.jpg\")
<\/a><\/div>\n<\/li>\n- \n2025\/03<\/div>\n\n
The QIC Releases New Video Highlighting Its Research Activities<\/p>\n
<\/div>\nAt our lab, we are working toward realizing quantum computers and quantum networks by developing quantum interfaces and quantum repeaters.
\nThese goals are defined by projects and carried out through the Quantum Information Research Center (QIC) at Yokohama National University, where I serve as director. Through QIC, we collaborate with leading researchers from Japan and abroad.<\/p>\n
Our students and researchers are encouraged to pursue diverse career paths while tackling fascinating scientific challenges that aim to bring innovation to future society.<\/p>\n
If you are interested in quantum technology, we welcome you to join our activities.
\nWe are also open to discussions on research collaboration and project proposals.<\/p>\n<\/div>\n<\/div>\n
Ongoing Projects<\/h3>\n\n\n<\/p>\n
\n<\/a>
\nCabinet Office Moonshot Research and Development Program – Goal 6<\/strong><\/p>\nDevelopment of Quantum Interfaces for Building Quantum Computer Networks<\/p>\n
Project period: FY2020\u2013FY2025<\/p>\n<\/div>\n
<\/p>\n
\n<\/a>
\nthe Ministry of Internal Affairs and Communications
\n<\/strong><\/p>\nResearch and Development of Key Technologies for Realizing the Quantum Internet<\/p>\n
Project period: FY2023\u2013FY2027<\/p>\n<\/div>\n
<\/p>\n
\n<\/a> <\/p>\nJST ASPIRE Program<\/strong><\/p>\n
\n<\/strong>Japan-Germany Quantum Technologies Joint Research Project<\/p>\nProject period: FY2025\u2013FY2029<\/p>\n<\/div>\n<\/div>\n<\/div>\n
Lab History<\/h3>\n\n- \n2025\/06<\/div>\nQIC signs collaboration agreement with AIST G-QuAT to promote the social implementation of quantum technologies <\/a><\/div>\n<\/li>\n
- \n2025\/03<\/div>\n\n
The QIC Releases New Video Highlighting Its Research Activities<\/p>\n
<\/p>\n
Development of Quantum Interfaces for Building Quantum Computer Networks<\/p>\n Project period: FY2020\u2013FY2025<\/p>\n<\/div>\n <\/p>\n Research and Development of Key Technologies for Realizing the Quantum Internet<\/p>\n Project period: FY2023\u2013FY2027<\/p>\n<\/div>\n <\/p>\n JST ASPIRE Program<\/strong><\/p>\n Project period: FY2025\u2013FY2029<\/p>\n<\/div>\n<\/div>\n<\/div>\n The QIC Releases New Video Highlighting Its Research Activities<\/p>\n<\/a>
\nCabinet Office Moonshot Research and Development Program – Goal 6<\/strong><\/p>\n<\/a>
\nthe Ministry of Internal Affairs and Communications
\n<\/strong><\/p>\n<\/a> <\/p>\n
\n<\/strong>Japan-Germany Quantum Technologies Joint Research Project<\/p>\nLab History<\/h3>\n
\n
<\/a><\/div>\n<\/li>\n