Controlled Secure Quantum Communication Using Pure Entangled W Class States

• 来源期刊: 理论物理通讯(英文版)
• 年，卷（期）: 2008,（4）
• 页码范围: 919-924
• 页数: 6页
• 语种: 英文

摘要

We present a controlled secure quantum communication protocol using non-maximally (pure) entangled W states first, and then discuss the basic requirements for a real quantum communication. We show that the authorized two users can exchange their secret messages with the help of the controller after purifying the non-maximally entangled states quantum channel unconditionally securely and simultaneously. Our quantum communication protocol seems even more feasible within present technologies.