Guo Qi, Cheng Liu-Yong, Wang Hong-Fu, Zhang Shou
Opt Express. 2018 Oct 15;26(21):27314-27325. doi: 10.1364/OE.26.027314.
We propose an alternative entanglement swapping scheme based on the principle of the counterfactual quantum communication, which demonstrates nonlocal entanglement swapping can be achieved by the operations of a third party. During the whole process, it is not needed to transmit any physical particles among the participants. Furthermore, all the entangled particles are not destroyed in the counterfactual entanglement swapping process, which means we can obtain two pairs of nonlocal entanglement at the same time, thus achieve high-efficiency entanglement distribution. The numerical analysis about the performance of the presented scheme shows that this counterfactual protocol can be implemented with high success probability and fidelity in the ideal asymptotic limit. The scheme may be meaningful for large-scale quantum communication network and quantum repeater.
我们提出了一种基于反事实量子通信原理的替代纠缠交换方案，该方案表明非局域纠缠交换可以通过第三方的操作来实现。在整个过程中，参与者之间无需传输任何物理粒子。此外，在反事实纠缠交换过程中所有纠缠粒子都不会被破坏，这意味着我们可以同时获得两对非局域纠缠，从而实现高效的纠缠分布。对所提出方案性能的数值分析表明，在理想渐近极限下，该反事实协议能够以高成功率和保真度实现。该方案可能对大规模量子通信网络和量子中继器具有重要意义。
