Trade-off between multiple-copy transformation and entanglement catalysis
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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.
Essentially the journal version. 7 pages, no figures. Minor corrections
Essentially the journal version. 7 pages, no figures. Minor corrections