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Secure continuous variable teleportation and Einstein-Podolsky-Rosen steering

He, Qiongyi; Rosales-Zárate, Laura; Adesso, Gerardo; Reid, Margaret D.

Authors

Qiongyi He

Laura Rosales-Zárate

Margaret D. Reid



Abstract

We investigate the resources needed for secure teleportation of coherent states. We extend continuous variable teleportation to include quantum teleamplification protocols that allow nonunity classical gains and a preamplification or postattenuation of the coherent state. We show that, for arbitrary Gaussian protocols and a significant class of Gaussian resources, two-way steering is required to achieve a teleportation fidelity beyond the no-cloning threshold. This provides an operational connection between Gaussian steerability and secure teleportation. We present practical recipes suggesting that heralded noiseless preamplification may enable high-fidelity heralded teleportation, using minimally entangled yet steerable resources.

Journal Article Type Article
Publication Date Oct 27, 2015
Journal Physical Review Letters
Print ISSN 0031-9007
Electronic ISSN 1079-7114
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 115
Issue 18
APA6 Citation He, Q., Rosales-Zárate, L., Adesso, G., & Reid, M. D. (2015). Secure continuous variable teleportation and Einstein-Podolsky-Rosen steering. Physical Review Letters, 115(18), https://doi.org/10.1103/PhysRevLett.115.180502
DOI https://doi.org/10.1103/PhysRevLett.115.180502
Publisher URL http://dx.doi.org/10.1103/PhysRevLett.115.180502
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf

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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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