Optimal universal asymmetric covariant quantum cloning circuits for qubit entanglement manipulation

Levente Szabó, Mátyás Koniorczyk, Peter Adam, József Janszky

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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.

Original languageEnglish
Article number032323
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume81
Issue number3
DOIs
Publication statusPublished - Mar 24 2010

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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