Universal covariant quantum cloning circuits for qubit entanglement manipulation
arXiv:0911.4356 · doi:10.1103/PhysRevA.81.032323
Abstract
We consider the entanglement manipulation capabilities of the universal covariant quantum cloner or quantum processor circuit for quantum bits. We investigate its use for cloning a member of a bipartite or a genuine tripartite entangled state of quantum bits. We find that for bipartite pure entangled states a nontrivial behavior of concurrence appears, while for GHZ entangled states a possibility of the partial extraction of bipartite entanglement can be achieved.
arXiv comment6 pages, 6 figures, RevTeX4
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