Establishing high-fidelity remote entanglement between quantum memories at high rates is a challenge that must be addressed to build scalable quantum networks. Chen et al. [Phys. Rev. Appl. 19, 054029 (2023)] proposed a zero-added loss multiplexing (ZALM) architecture to address this issue with a quasi-deterministic entangled photon pair source. This source was analyzed in detail by Shapiro et al. [Phys. Rev. Applied 22, 044014 (2024)] for biphoton emission from a spontaneous parametric down-conversion (SPDC) process. A trade-off was found between heralding efficiency and Bell-state fidelity when the filtered joint spectral amplitude was not factorable. An extension of this work by Shapiro et al. [arXiv:2507.14427 (2025)] evaluated a ZALM source’s performance when the filtered joint spectral amplitude was factorable, allowing multi-pair emission events from SPDC to be incorporated at all orders. A rate-fidelity tradeoff was quantified, and a resource-efficient source was proposed to decrease the experimental overhead.

Clark Embleton is a PhD candidate at the University of Oregon working in the field of experimental quantum optics with Prof. Brian Smith and Prof. Michael Raymer. He received a BS degree in physics from Oregon State University.