Secure continuous variable quantum teleportation and Einstein-Podolsky-Rosen steering
Abstract
We investigate the resources needed for secure teleportation of coherent states. We extend continuous variable teleportation to include quantum tele-amplification protocols, that allow non-unity classical gains and a pre-amplification or post-attenuation 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 pre-amplification may enable high-fidelity heralded teleportation, using minimally entangled yet steerable resources.
Cite
@article{arxiv.1410.1041,
title = {Secure continuous variable quantum teleportation and Einstein-Podolsky-Rosen steering},
author = {Qiongyi He and Laura Rosales-Zarate and Gerardo Adesso and Margaret Reid},
journal= {arXiv preprint arXiv:1410.1041},
year = {2016}
}
Comments
5 pages, 4 figures, improved referencing and new proofs, supplementary materials included