Authors: Yonggi Jo, Wonmin Son
Published in: Physical Review A, 94(5), 052316 (2016)

Abstract

This paper explores the use of qutrit states (three-dimensional quantum states) to enhance the key rate in quantum key distribution (QKD) systems. By employing askew aligned sources, the authors demonstrate a significant improvement in the efficiency and security of QKD protocols. The study provides a theoretical framework and experimental insights into the advantages of high-dimensional quantum states in secure communication.

Key Contributions

  • High-dimensional QKD: Introduced the use of qutrit states to improve the key rate in QKD systems.
  • Askew Aligned Sources: Proposed a novel alignment method to optimize the performance of QKD protocols.
  • Security Analysis: Provided a detailed analysis of the security benefits of using qutrit states over traditional qubit-based systems.

Significance

This research highlights the potential of high-dimensional quantum states in advancing the field of quantum cryptography. The findings pave the way for more efficient and secure QKD systems, which are crucial for the future of secure communication in the quantum era.

Citation

Yonggi Jo, Wonmin Son,
“Key-rate enhancement using qutrit states for quantum key distribution with askew aligned sources”,
Physical Review A, 94(5), 052316 (2016).
DOI: 10.1103/PhysRevA.94.052316