Multi-copy entanglement purification with practical spontaneous parametric down conversion sources

Zhang Shuai-Shuai^{1, 3}, Shu Qi^{1, 3}, Zhou Lan², Sheng Yu-Bo^{1, †}

(color online) The increased fidelity altered with the initial fidelity F. The curve A is this three-copy EPP with SPDC sources. Curve B is the EPP in Ref. [50].