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.
Entanglement purification on quantum networks
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Advanced r-to-1 bilocal-Clifford purification protocols reduce the median number of copies needed for hop-independent fidelity from 268 to 30 compared with BBPSSW at p_th=0.70, with feasibility governed by the w0^ℓ > 1/3 threshold.
citing papers explorer
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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.
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Toward Hop-Independent Fidelity in Quantum Data Centers: Resource Requirements for Entanglement Purification
Advanced r-to-1 bilocal-Clifford purification protocols reduce the median number of copies needed for hop-independent fidelity from 268 to 30 compared with BBPSSW at p_th=0.70, with feasibility governed by the w0^ℓ > 1/3 threshold.