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Continuous-variable versus hybrid schemes for quantum teleportation of Gaussian states

Kogias, Ioannis; Ragy, Sammy; Adesso, Gerardo

Authors

Ioannis Kogias

Sammy Ragy



Abstract

In this paper, we examine and compare two fundamentally different teleportation schemes: the well-known continuous-variable scheme of Vaidman, Braunstein, and Kimble (VBK) and a recently proposed hybrid scheme by Andersen and Ralph (AR). We analyze the teleportation of ensembles of arbitrary pure single-mode Gaussian states using these schemes and see how they fare against the optimal measure-and-prepare strategies—the benchmarks. In the VBK case, we allow for nonunit gain tuning and additionally consider a class of non-Gaussian resources in order to optimize performance. The results suggest that the AR scheme may likely be a more suitable candidate for beating the benchmarks in the teleportation of squeezing, capable of achieving this for moderate resources in comparison to the VBK scheme. Moreover, our quantification of resources, whereby different protocols are compared at fixed values of the entanglement entropy or the mean energy of the resource states, brings into question any advantage due to non-Gaussianity for quantum teleportation of Gaussian states.

Journal Article Type Article
Publication Date May 23, 2014
Journal Physical Review A
Print ISSN 2469-9926
Electronic ISSN 2469-9934
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 89
Issue 5
APA6 Citation Kogias, I., Ragy, S., & Adesso, G. (2014). Continuous-variable versus hybrid schemes for quantum teleportation of Gaussian states. Physical Review A, 89(5), https://doi.org/10.1103/PhysRevA.89.052324
DOI https://doi.org/10.1103/PhysRevA.89.052324
Publisher URL https://journals.aps.org/pra/abstract/10.1103/PhysRevA.89.052324
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information ©2014 American Physical Society

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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