Abstract
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 language | English |
---|---|
Article number | 050303 |
Journal | Chinese Physics Letters |
Volume | 29 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2012 May |
ASJC Scopus subject areas
- General Physics and Astronomy