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Title: Quantum correlations support probabilistic pure state cloning
Author: Roa, L.
Alid-Vaccarezza, M.
Jara-Figueroa, C.
Klimov, Andrei B.
Issue Date: 2014
Abstract: The probabilistic scheme for making two copies of two nonorthogonal pure states requires two auxiliary systems, one for copying and one for attempting to project onto the suitable subspace. The process is performed by means of a unitary-reduction scheme which allows having a success probability of cloning different from zero. The scheme becomes optimal when the probability of success is maximized. In this case, a bipartite state remains as a free degree which does not affect the probability. We find bipartite states for which the unitarity does not introduce entanglement, but does introduce quantum discord between some involved subsystems. � 2014 Elsevier B.V. All rights reserved.
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