Local permutations of products of Bell states and entanglement distillation
Jeroen Dehaene, Maarten Van den Nest, Bart De Moor, Frank Verstraete · Physical Review A · 2003
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.