基于双光子纠缠与贝尔态测量任意两量子比特态的量子态共享
量子物理
2009-11-11 v2
摘要
提出了两种基于纠缠交换、利用贝尔态测量和局域幺正操作共享任意两量子比特态的方案。一种基于预先共享的四对爱因斯坦-波多尔斯基-罗森(EPR)对量子信道。另一种基于环形拓扑结构,即每个用户与相邻用户共享一对 EPR 对。前者的优势在于代理间量子信道的构建由发送方 Alice 控制,这将提升方案安全性。环形方案在代理数量大时大幅减少量子资源。两种方案均具有高效率特性,因几乎所有实例都可用于分割量子信息。它们比现有其他方案更便于应用,因仅需两量子比特纠缠与两量子比特联合测量即可共享任意两量子比特态。
引用
@article{arxiv.quant-ph/0509029,
title = {Quantum state sharing of an arbitrary two-qubit state with two-photon entanglements and Bell-state measurements},
author = {Fu-Guo Deng and Xi-Han Li and Chun-Yan Li and Ping Zhou and Hong-Yu Zhou},
journal= {arXiv preprint arXiv:quant-ph/0509029},
year = {2009}
}
备注
6 pages, 2 figures; It is a supplement for quant-ph/0504158 and simplify the measurements in the latter. Moreover, it reduecs the quantum resource largely when the number of the agents is large, compared with quant-ph/0504158