Optical state engineering, quantum communication, and robustness of entanglement promiscuity in three-mode Gaussian states (Articolo in rivista)

Type
Label
  • Optical state engineering, quantum communication, and robustness of entanglement promiscuity in three-mode Gaussian states (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Alternative label
  • Adesso, G; Serafini, A; Illuminati, F (2007)
    Optical state engineering, quantum communication, and robustness of entanglement promiscuity in three-mode Gaussian states
    in New journal of physics
    (literal)
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  • Adesso, G; Serafini, A; Illuminati, F (literal)
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  • 9 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Univ London Imperial Coll Sci Technol & Med, Inst Math Sci, London SW7 2PE, England; Univ London Imperial Coll Sci Technol & Med, Blackett Lab, QOLS, London SW7 2BW, England; Univ Coll London, Dept Phys & Astron, London WC1E 6BT, England; Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy; Consorzio Nazl Interuniv Sci Fis Mat, I-00185 Rome, Italy; Univ Cambridge, Ctr Math Sci, DAMTP, Ctr Quantum Computat, Cambridge CB3 0WA, England; Univ Salerno, CNR Coherentia, Dipartimento Fis ER Caianiello, I-84081 Baronissi, SA, Italy; Ist Nazl Fis Nucl, Sez Napoli, Grp Collegato Salerno, I-84081 Baronissi, SA, Italy (literal)
Titolo
  • Optical state engineering, quantum communication, and robustness of entanglement promiscuity in three-mode Gaussian states (literal)
Abstract
  • We present a novel, detailed study on the usefulness of three-mode Gaussian states for realistic processing of continuous variable (CV) quantum information, with a particular emphasis on the possibilities opened up by their genuine tripartite entanglement. We describe practical schemes to engineer several classes of pure and mixed three-mode states that stand out for their informational and/or entanglement properties. In particular, we introduce a simple procedure-based on passive optical elements-to produce pure three-mode Gaussian states with arbitrary entanglement structure (upon availability of an initial two-mode squeezed state). We analyse in depth the properties of distributed entanglement and the origin of its sharing structure, showing that the promiscuity of entanglement sharing is a feature peculiar to symmetric Gaussian states that survives even in the presence of significant degrees of mixedness and decoherence. Next, we discuss the suitability of the considered tripartite entangled states to the implementation of quantum information and communication protocols with CVs. This will lead to a feasible experimental proposal to test the promiscuous sharing of CV tripartite entanglement, in terms of the optimal fidelity of teleportation networks with Gaussian resources. We finally focus on the application of three-mode states to symmetric and asymmetric telecloning, and single out the structural properties of the optimal Gaussian resources for the latter protocol in different settings. Our analysis aims to lay the basis for a practical quantum communication with CVs beyond the bipartite scenario. (literal)
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