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About Our Laboratory

Introduction

 　We are investigating communications technology of the future, so-called quantum info-communications, which directly controls the quantum mechanical properties of photons and electrons. The world of quantum mechanics promises a number of significant advances that are beyond the capabilities of conventional info-communications technologies. For example, it is possible to increase the reliability of information transmitted even at single-photon level by using a coding scheme that controls the quantum states of light. We aim at exploring theories to treat information in quantum mechanics properly, to develop basic technologies for controlling the quantum states of photons, and to realize as many dreams as possible for our future society.

What's New

 Recent Topics・ Recent Publications (Last update: Mar.2, 2026)


◆Press Release   NEW  

"World’s First Demonstration of Entanglement Swapping Using Sum-Frequency Generation Between Single Photons" 
(Nov.6, 2025)
             
◆Press Release   NEW  

"World’s First Integrated System for Quantum Key Distribution and High-Speed Data Transmission in a Large-Capacity Optical Transmission System Demonstration Environment for IOWN Open APN

Aiming to introduce low-cost, secure Quantum Key Distribution services in backbone optical networks of telecommunications carriers" 
(Sep.16, 2025)

◆"Finite-key security analysis of the decoy-state BB84 QKD with passive measurement "
Quantum Science and Technology (IOP science) Vol.11 No.015010 Page1 - 20 (2025)
（Feb 18,2026）

◆"Isotope-selective Ion Trapping via Sympathetic Cooling using a Surface-Electrode Trap with a Hole for Collimated Atomic Loading "
Scientific Reports Vol.16 Page300 – (2026)
（Feb 18,2026）

◆"Security framework for quantum key distribution with imperfect sources "
Optica Quantum 12月号 Vol.3 No.6 Page525 - 534 (2025)
（Feb 18,2026）

◆"On the Hardness of Conversion from Entangled Proof into Separable One "
Mathematical Foundations for Post-Quantum Cryptography, Page35 – 49 (2025)
（Feb 18,2026）

◆"Experimental entanglement swapping through single-photon χ(2) nonlinearity "
Nature Communications (2025)
（Feb 18,2026）

◆"Quantum forum Technical Documents " (2025)
（Feb 18,2026）

◆"Do black holes store negative entropy? "
Progress of Theoretical and Experimental Physics, ptaf052 (2025)
（Feb 18,2026）

◆"Development of a bipolar 50 V output digital-to-analog converter system for ion-shuttling operations "
Journal of Applied Physics, Vol.137 Page144401-1 - 144401-9 (2025)
（Feb 18,2026）

◆"Characterization of grating couplers for 40 Ca+ based integrated surface ion traps "
CLEO　Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science (CLEO/QELS)
（Feb 18,2026）

◆"Information-theoretically secure equality-testing protocol with dispute resolution "
2023 IEEE International Symposium on Information Theory (ISIT).
（Feb 18,2026）

◆"Information Theoretically Secure Data Relay Using QKD Network"
IEEE access Vol.12 ,Page141167 – 141178 (2024),has been added to the list of publications.
（Sep 3, 2025）

◆"Probabilistic Unitary Synthesis with Optimal Accuracy"
ACM Trans. Quantum Comput., August 2024 Vol.5 No.3,has been added to the list of publications.
（Sep 3, 2025）

◆"Modelocked Thermal Frequency Combs for Ultrashort Chaotic Quantum Optics"
Advanced Quantum Technologies, 2024, has been added to the list of publications.
（Sep 3, 2025）

             
◆Press Release

"TOPPAN Digital, NICT, and ISARA Develop Smart Card System Employing Hybrid Methodology to Support Post-Quantum Cryptography and Current Public-key Cryptography
Facilitating a smooth transition to post-quantum cryptography to ensure the safety and security of social infrastructure"  (Oct.7, 2024)


► List of Publications
► List of Press Releases


◆New Topic
Department name "Quantum ICT Development Center, Advanced ICT Institute" has been changed to "Quantum ICT Laboratory, Koganei Frontier Research Center, Advanced ICT Institute."  (Apr. 1, 2021)

R & D Promotion of Quantum Cryptography and Communications

Macroscopic Quantum Physics Research Project

Macroscopic Quantum Physics Research Project
Research and Development of Superconducting Qubits

Quantum ICT Collaboration Center,NICT

Quantum ICT Collaboration Center,NICT

Commentary Videos

The mechanism of QKD (UQCC 2015 commentary video)

QKD-AES Hybird System (UQCC 2015 commentary video)

A vision of the future (UQCC 2015 cartoon video)

Introduction to Quantum Cryptography and the Tokyo QKD Network

Terms and Conditions of Use

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Contact Us

Quantum ICT Laboratory Koganei Frontier Research Center Advanced ICT Research Institute National Institute of Information and Communications Technology

Go KATO, Director

4-2-1 Nukui-Kitamachi, Koganei, Tokyo 184-8795, JAPAN

Phone: +81-42-327-6051　　Fax: +81-42-327-6629

E-mail: