Universal covariant quantum cloning circuits for qubit entanglement manipulation

Details Universal covariant quantum cloning circuits for qubit entanglement manipulation Universal covariant quantum cloning circuits for qubit entanglement manipulation

2009-11-23

arxiv.org/abs/0911.4356v1

Physics

Quantum Physics

6 pages, 6 figures, RevTeX4

Scientific paper

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.

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