Multiplexed quantum repeaters based on single-photon interference with mild stabilization
Abstract: Quantum repeaters are pivotal in the physical layer of the quantum internet. For its development, quantum repeaters capable of efficient entanglement distribution are necessary. Quantum repeater schemes based on single-photon interference are promising due to their potential efficiency. However, schemes involving first-order interference with photon sources at distant nodes require stringent phase stability in the components, which poses challenges for long-distance implementation. In this paper, we present a quantum repeater scheme that leverages single-photon interference with reduced difficulty of phase stabilization. Additionally, under specific conditions, we demonstrate that our scheme achieves a higher entanglement distribution rate between end nodes compared to existing schemes. This approach, implementable using only feasible technologies including multimode quantum memories and two-photon sources, offers high entanglement distribution rates and mild phase stabilization, leading to the development of multimode quantum repeaters.
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