Open AccessContinuous-variable quantum deterministic key distribution protocol based on quantum teleportation
Author(s) -
Song Han-Chong,
Li Gong,
Nanrun Zhou
Publication year - 2012
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.61.154206
Subject(s) - quantum key distribution , computer science , quantum network , quantum teleportation , quantum channel , key (lock) , quantum cryptography , quantum information science , protocol (science) , quantum information , theoretical computer science , statistical physics , quantum mechanics , physics , quantum , quantum entanglement , computer security , medicine , alternative medicine , pathology
By exploiting quantum teleportation, we propose a continuous-variable quantum deterministic key distribution (CVQDKD) protocol using two-mode squeezed vacuum state and coherent state. The efficiency is 100% under the homodyne detection. The security of CVQDKD is analyzed in detail from information theory, and the result shows that the proposed protocol can securely hand over the pre-deterministic key. By contrast with the quantum random key distribution, the quantum deterministic key distribution plays an irreplaceable role in the field of key management. Furthermore, the CVQDKD can obtain a higher rate and better efficiency than the quantum deterministic key distribution protocols with discrete variables, and the quantum states used in the protocol are also easy to produce and manipulate, which i suitable for long-distance transmission. Therefore, the CVQDKD protocol is more practical.