Improved two-party and multi-party purification protocols
Elitza Maneva, John A. Smolin · Contemporary mathematics - American Mathematical Society · 2002
We present an improved protocol for entanglement purification of bipartite mixed states using several states at a time rather than two at a time as in the traditional recurrence method. We also present a generalization of the hashing method to n-partite cat states, which achieves a finite yield of pure cat states for any desired fidelity. Our results are compared to previous protocols.