Secure continuous variable teleportation and Einstein-Podolsky-Rosen steering

He, Qiongyi; Rosales-Z�rate, Laura; Adesso, Gerardo; Reid, Margaret D.

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.

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

• Journal Article Type: Article
• Acceptance Date: Oct 1, 2015
• Publication Date: Oct 27, 2015
• Deposit Date: Feb 24, 2017
• Publicly Available Date: Feb 24, 2017
• Journal: Physical Review Letters
• Print ISSN: 0031-9007
• Electronic ISSN: 1079-7114
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 115
• Issue: 18
• DOI: https://doi.org/10.1103/PhysRevLett.115.180502
• Public URL: https://nottingham-repository.worktribe.com/output/763134
• Publisher URL: http://dx.doi.org/10.1103/PhysRevLett.115.180502