The exploitation of quantum coherence at the level of propagation represents a powerful paradigm for quantum communication networks. In this work, we show that the coherent superposition of spatially distinct communication links enables entanglement generation inherently during distribution. Specifically, separable quantum states can be deterministically transformed into entangled states, when the noisy communication links they traverse are coherently superposed. Contrary to the conventional view of noise as a detrimental effect, we demonstrate that quantum noise itself can be transformed into a constructive resource for entanglement generation for both bipartite and multipartite entanglement. Given the practical feasibility of implementing spatial superposition in interferometric setups, our approach provides a feasible method for distributed entanglement engineering, opening new directions for quantum communication and networked quantum technologies.

翻译：在传播层面上利用量子相干性为量子通信网络提供了一种强大的范式。在这项工作中，我们证明空间上不同的通信链路的相干叠加能够使得纠缠在分布过程中内在地生成。具体而言，当可分离的量子态所穿越的有噪声通信链路被相干叠加时，这些量子态可被确定性地转化为纠缠态。与将噪声视为有害效应的传统观点相反，我们论证了量子噪声本身能够转化为一种建设性的资源，用于生成两体和多体纠缠。鉴于在干涉仪装置中实现空间叠加的实际可行性，我们的方法为分布式纠缠工程提供了可行的方案，为量子通信和网络化量子技术开辟了新方向。