Entanglement Generation via Spatial Path Superposition

Entanglement generation and distribution is a core functionality of quantum networks. Traditional approaches to this functionality rely on chains of quantum repeaters or on manipulation of multipartite states. In this work, we explore an alternative paradigm that explores quantum coherence at propagation level, by enabling genuine quantum instantiations of communication channels, existing in superposed configurations. We demonstrate that this mechanism can be harnessed to generate both bipartite and multipartite entangled states from separable inputs. Specifically, we show that Bell states can be obtained from initially separable two-qubit states, through the superposition of two unitary quantum channels. The proposed approach is further extended to multipartite systems, by generating n-qubit GHZ and W states and thereby revealing the constructive role of superposed quantum operations in entanglement creation. Moreover, we analyze the robustness of the proposed scheme against noise, showing that the resulting states retain high fidelity and concurrence even under realistic imperfections. Our results suggest that, under appropriate quantum control, noisy superposed paths can be effectively harnessed to engineer entanglement generation and distribution in quantum networks.