Physical Review A, Atomic, Molecular and Optical Physics vol:67 issue:2 pages:022310_1-022310_6
We present different algorithms for mixed-state multicopy entanglement distillation for pairs of qubits. Our algorithms perform significantly better than the best-known algorithms. Better algorithms can be derived that are tuned for specific initial states. These algorithms are based on a characterization of the group of all locally realizable permutations of the 4(n) possible tensor products of n Bell states.