Secure four-site distribution and quantum communication of χ−type entangled states

✍ Scribed by Xiao-Ming Xiu; Li Dong; Ya-Jun Gao

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 174 KB
• Volume: 284
• Category: Article
• ISSN: 0030-4018
• DOI: 10.1016/j.optcom.2010.11.084

✦ Synopsis

The research of multi-particle entanglement is a hot topic because of its important applications and farreaching effects on vast aspects of quantum information. The article is devoted to the χtype entangled state, a peculiar four-particle entangled state, which is different from a four-particle GHZ or W state under stochastic local operations and classical communication (SLOCC). Secure four-site distribution using decoy particles is proposed. Moreover, applying it, several communication protocols are presented, including fourparty hierarchical quantum secret sharing, supervisory three-party asymmetric deterministic secure quantum communication, etc. The security of the four-site distribution and the communication protocols are also analyzed.