Secure continuous variable teleportation and Einstein-Podolsky-Rosen steering

He, Qiongyi and Rosales-Zárate, Laura and Adesso, Gerardo and Reid, Margaret D. (2015) Secure continuous variable teleportation and Einstein-Podolsky-Rosen steering. Physical Review Letters, 115 (18). p. 180502. ISSN 1079-7114

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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.

Item Type: Article
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Mathematical Sciences
Identification Number: 10.1103/PhysRevLett.115.180502
Depositing User: Adesso, Gerardo
Date Deposited: 24 Feb 2017 11:40
Last Modified: 12 Oct 2017 22:18
URI: http://eprints.nottingham.ac.uk/id/eprint/40769

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