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Quantum Information Processing
Erschienen in: Quantum Information Processing 1/2019

01.01.2019

Non-Gaussian swapping of entangled resources

verfasst von: Fabio Dell’Anno, Daniela Buono, Gaetano Nocerino, Silvio De Siena, Fabrizio Illuminati

Erschienen in: Quantum Information Processing | Ausgabe 1/2019

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Abstract

We investigate the continuous-variable entanglement swapping protocol in a non-Gaussian setting, with non-Gaussian states employed either as entangled inputs and/or as swapping resources. The quality of the swapping protocol is assessed in terms of the teleportation fidelity achievable when using the swapped states as shared entangled resources in a teleportation protocol. We thus introduce a two-step cascaded quantum communication scheme that includes a swapping protocol followed by a teleportation protocol. The swapping protocol is fed by a general class of tunable non-Gaussian states, the Squeezed Bell states, which, by means of controllable free parameters, allows to pass in a continuous way from Gaussian twin beams up to maximally non-Gaussian squeezed number states. In the realistic instance, taking into account the effects of losses and imperfections, we show that as the input two-mode squeezing increases, optimized non-Gaussian swapping resources allow for a monotonically increasing enhancement of the fidelity compared to the corresponding Gaussian setting. This result suggests that the use of non-Gaussian resources can be useful to guarantee the success of continuous-variable entanglement swapping in the presence of decoherence.
Vorheriger Artikel Multiparty quantum secure direct communication immune to collective noise
Nächster Artikel Two quantum protocols for secure hamming distance computation

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Metadaten
Titel
Non-Gaussian swapping of entangled resources
verfasst von
Fabio Dell’Anno
Daniela Buono
Gaetano Nocerino
Silvio De Siena
Fabrizio Illuminati
Publikationsdatum
01.01.2019
Verlag
Springer US
Erschienen in
Quantum Information Processing / Ausgabe 1/2019
Print ISSN: 1570-0755
Elektronische ISSN: 1573-1332
DOI
https://doi.org/10.1007/s11128-018-2133-1

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