Fault tolerant deterministic quantum communications using GHZ states over collective-noise channels

作者：Yang Chun Wei; Tsai Chia Wei; Hwang Tzonelih^*

来源：Quantum Information Processing, 2013, 12(9): 3043-3055.

DOI：10.1007/s11128-013-0582-0

• Collective noise
• Deterministic quantum communication
• GHZ state
• Quantum cryptography

This study proposes two new coding functions for a GHZ state and a GHZ-like state, respectively. Based on these coding functions, two fault tolerant deterministic quantum communication (DQC) protocols are proposed. Each of the new DQC%26apos;s is robust under one kind of collective noises: collective-dephasing noise and collective-rotation noise, respectively. The sender can use the proposed coding functions to encode his/her message, and the receiver can perform the Bell measurement to obtain the sender%26apos;s message. In comparison to the existing fault tolerant DQC protocols over collective-noise channels, the proposed protocols provide the best qubit efficiency. Moreover, the proposed protocols are also free from the ordinary eavesdropping and the information leakage.

• 出版日期2013-9