Sequential quantum cloning

Y. Delgado, L. Lamata, J. León, D. Salgado, E. Solano

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

23 Citas (Scopus)


Not all unitary operations upon a set of qubits can be implemented by sequential interactions between each qubit and an ancillary system. We analyze the specific case of sequential quantum cloning, 1→M, and prove that the minimal dimension D of the ancilla grows linearly with the number of clones M. In particular, we obtain D=2M for symmetric universal quantum cloning and D=M+1 for symmetric phase-covariant cloning. Furthermore, we provide a recipe for the required ancilla-qubit interactions in each step of the sequential procedure for both cases. © 2007 The American Physical Society.
Idioma originalEspañol
PublicaciónPhysical Review Letters
EstadoPublicada - 13 abr. 2007
Publicado de forma externa

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