Fault tolerant deterministic secure quantum communication using logical Bell states against collective noise

• 作者: 刘建伟 尚涛 毕亚港 王朝 陈秀波
• 来源期刊: 中国物理B（英文版）
• 关键词: collective noise deterministic secure quantum communication logical Bell states
• 年，卷（期）: 2015,（4）
• 页码范围: 040304-1-040304-10
• 页数: 1页
• 语种: 英文
• DOI: 10.1088/1674-1056/24/4/040304

摘要

This study proposes two novel fault tolerant deterministic secure quantum communication (DSQC) schemes resistant to collective noise using logical Bell states. Either DSQC scheme is constructed based on a new coding function, which is designed by exploiting the property of the corresponding logical Bell states immune to collective-dephasing noise and collective-rotation noise, respectively. The secret message can be encoded by two simple unitary operations and decoded by merely performing Bell measurements, which can make the proposed scheme more convenient in practical applications. Moreover, the strategy of one-step quanta transmission, together with the technique of decoy logical qubits checking not only reduces the influence of other noise existing in a quantum channel, but also guarantees the security of the communi-cation between two legitimate users. The final analysis shows that the proposed schemes are feasible and robust against various well-known attacks over the collective noise channel.