A quantum network system of QSS-QDC using χ-type entangled states

Chang Ho Hong, Jin O. Heo, Jong In Lim, Hyung Jin Yang

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


A multiuser quantum direct communication network system for N users utilizing χ-type entangled states is proposed. The network system is composed of a communication center, N users, and N quantum lines linking the center and the N users. There is no quantum line among users, and therefore only N quantum lines are necessary for communication between users. Using one χ-type entangled state, in this protocol we are able to send two bits of information through direct communication and, at the same time, share two bits of quantum keys. The security of the protocol is then analyzed.

Original languageEnglish
Article number050303
JournalChinese Physics Letters
Issue number5
Publication statusPublished - 2012 May

ASJC Scopus subject areas

  • General Physics and Astronomy


Dive into the research topics of 'A quantum network system of QSS-QDC using χ-type entangled states'. Together they form a unique fingerprint.

Cite this