Entanglement Generation During Distribution via Spatial Superposition Entanglement Generation
This work provides a new paradigm for entanglement generation in quantum communication networks, potentially simplifying distributed quantum technologies.
The authors show that coherent superposition of spatially distinct communication links can deterministically transform separable quantum states into entangled states during distribution, using quantum noise as a constructive resource. This method works for both bipartite and multipartite entanglement.
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.