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Related Experiment Video

Updated: Feb 27, 2026

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
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Quantum photonic network and physical layer security.

Masahide Sasaki1, Hiroyuki Endo2, Mikio Fujiwara2

  • 1Quantum ICT Advanced Development Center, National Institute of Information and Communications Technology, 4-2-1, Nukuikitamachi, Koganei, Tokyo 184-8795, Japan psasaki@nict.go.jp.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|June 28, 2017
PubMed
Summary

This study introduces a quantum photonic network for secure communication. Experiments in a free space optical wiretap channel demonstrate a balance between transmission efficiency and security for quantum technology.

Keywords:
free space optical communicationsphysical layer securityquantum cryptographyquantum key distributionquantum photonic networkwiretap channel

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Area of Science:

  • Quantum Information Science
  • Optical Communications
  • Cybersecurity

Background:

  • Quantum communication offers enhanced transmission rates, while quantum cryptography provides data confidentiality.
  • Existing schemes do not fully address the intermediate region between high transmission rates and robust security.
  • Free space optical (FSO) wiretap channels present a scenario where an eavesdropper has limited physical access.

Purpose of the Study:

  • To investigate a quantum photonic network scheme that bridges quantum communication and cryptography.
  • To establish a theoretical framework for optimizing transmission efficiency and security under constraints.
  • To experimentally characterize a terrestrial FSO wiretap channel for quantum information transfer.

Main Methods:

  • Reviewing theoretical frameworks for quantifying the trade-off between transmission efficiency and security.
  • Analyzing information-theoretically secure communication in FSO wiretap channels.
  • Conducting channel characterization experiments using 10 MHz on-off keying in a 7.8 km FSO link.

Main Results:

  • A theoretical framework was developed to balance transmission efficiency and security under power and finite code length constraints.
  • Experimental data was collected for channel characterization in a terrestrial FSO wiretap channel.
  • The study quantifies the optimal balance for secure communication in FSO environments.

Conclusions:

  • The proposed quantum photonic network scheme shows potential for secure communication in FSO channels.
  • Experimental validation provides insights into the practical implementation of secure quantum communication.
  • This research contributes to advancing quantum technology for secure data transmission.