Multipartite asymmetric quantum cloning

Journal Article · Sat Oct 15 04:00:00 EDT 2005 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.72.042328· OSTI ID:20718721

Iblisdir, S; Gisin, N ^[1]; Acin, A ^[2]; Cerf, N J ^[3]; Filip, R ^[4]; Fiurasek, J ^[3]

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1. GAP-Optique, University of Geneva, 20 rue de l'Ecole-de-Medecine, CH-1211 (Switzerland)
2. ICFO-Institut de Ciencies Fotoniques, Jordi Girona 29, 08034 Barcelona (Spain)
3. QUIC, Ecole Polytechnique, CP 165, Universite Libre de Bruxelles, 1050 Brussels (Belgium)
4. Department of Optics, Palacky University, 17. listopadu 50, 77200 Olomouc (Czech Republic)

We investigate the optimal distribution of quantum information over multipartite systems in asymmetric settings. We introduce cloning transformations that take N identical replicas of a pure state in any dimension as input and yield a collection of clones with nonidentical fidelities. As an example, if the clones are partitioned into a set of M{sub A} clones with fidelity F{sup A} and another set of M{sub B} clones with fidelity F{sup B}, the trade-off between these fidelities is analyzed, and particular cases of optimal N{yields}M{sub A}+M{sub B} cloning machines are exhibited. We also present an optimal 1{yields}1+1+1 cloning machine, which is an example of a tripartite fully asymmetric cloner. Finally, it is shown how these cloning machines can be optically realized.

• OSTI ID: 20718721
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 4 Vol. 72; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ASYMMETRY
CLONING
DISTRIBUTION
INFORMATION THEORY
QUANTUM INFORMATION
QUANTUM MECHANICS
TRANSFORMATIONS