Quantum cloning in spin networks

Gabriele De Chiara, R. Fazio, C. Macchiavello, S. Montangero, Massimo Palma

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62 Citations (Scopus)


We introduce an approach to quantum cloning based on spin networks and we demonstrate that phase covariant cloning can be realized using no external control but only with a proper design of the Hamiltonian of the system. In the 1-->2 cloning we find that the XY model saturates the value for the fidelity of the optimal cloner and gives values comparable to it in the general N-->M case. We finally discuss the effect of external noise. Our protocol is much more robust to decoherence than a conventional procedure based on quantum gates.
Original languageEnglish
Article number062308
Pages (from-to)062308-1-062308-4
JournalPhysical Review A
Issue number6
Publication statusPublished - Dec 2004

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Physics and Astronomy(all)

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