Fast multi-copy entanglement purification with linear optics
Cai Chuna),c), Zhou Lana),b), Sheng Yu-Bo†a),c)
       
The increased fidelity of F n altered with the initial fidelity F . The curve with n = 2 is the original EPP in Ref. [ 41 ]. It is shown that they can obtain a high fidelity with multi-copy degraded mixed states.