A fidelity asymmetry tolerance of roughly 0.076 marks the point beyond which entanglement purification becomes counterproductive in quantum networks, and conditioning purification decisions on measured asymmetry improves end-to-end performance.
Reducing classical communication costs in multiplexed quantum repeaters using hardware-aware quasi-local policies
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To Purify or Not to Purify: Entanglement Purification under Input Fidelity Asymmetry in Quantum Networks
A fidelity asymmetry tolerance of roughly 0.076 marks the point beyond which entanglement purification becomes counterproductive in quantum networks, and conditioning purification decisions on measured asymmetry improves end-to-end performance.