Trade-off between multiple-copy transformation and entanglement catalysis
Runyao Duan, Yuan Feng, Xin Li, Mingsheng Ying · Physical Review A · 2005
We demonstrate that multiple copies of a bipartite entangled pure state may serve as a catalyst for certain entanglement transformations while a single copy cannot. Such a state is termed a ``multiple-copy catalyst'' for the transformations. A trade-off between the number of copies of source state and that of the catalyst is also observed. These results can be generalized to probabilistic entanglement transformations directly.