Efficient and Robust Quantum Key Distribution With Minimal State Tomography
摘要
We introduce the Singapore protocol, a qubit protocol for quantum key distribution that is fully tomographic, more efficient than other tomographic protocols, and very robust. Under ideal circumstances the efficiency is log_2(4/3)=0.415 key bits per qubit sent. This is 25% more than the efficiency of 1/3=0.333 for the standard six-state protocol, which sets the benchmark. We describe a simple two-way communication scheme that extracts 0.4 key bits per qubit and thus gets close to the information-theoretical limit. The noise thresholds that we report for a hierarchy of eavesdropping attacks demonstrate the robustness of the protocol: A secure key can be extracted if there is less than 38.9% noise.
引用
@article{arxiv.quant-ph/0412075,
title = {Efficient and Robust Quantum Key Distribution With Minimal State Tomography},
author = {Berthold-Georg Englert and Dagomir Kaszlikowski and Hui Khoon Ng and Wee Kang Chua and Jaroslav Řeháček and Janet Anders},
journal= {arXiv preprint arXiv:quant-ph/0412075},
year = {2008}
}
备注
Title modified; 4 pages, 2 figures; v4 is the updated and much extended version of 18/05/08; this is Ref. [30] in quant-ph/0405084 v2