UNIGE document Scientific Article
previous document  unige:94656  next document
add to browser collection

Heralded amplification of path entangled quantum states

Published in Quantum Science and Technology. 2017, vol. 2, no. 2, p. 024008
Abstract Device-independent quantum key distribution (DI-QKD) represents one of the most fascinating challenges in quantum communication, exploiting concepts of fundamental physics, namely Bell tests of nonlocality, to ensure the security of a communication link. This requires the loophole-free violation of a Bell inequality, which is intrinsically difficult due to losses in fibre optic transmission channels. Heralded photon amplification (HPA) is a teleportation-based protocol that has been proposed as a means to overcome transmission loss for DI-QKD. Here we demonstrate HPA for path entangled states and characterise the entanglement before and after loss by exploiting a recently developed displacement-based detection scheme. We demonstrate that by exploiting HPA we are able to reliably maintain high fidelity entangled states over loss-equivalent distances of more than 50 km.
Keywords quantum amplifier
Full text
Article (Published version) (565 Kb) - document accessible for UNIGE members only Limited access to UNIGE
Other version: https://doi.org/10.1088/2058-9565/aa70ad
Research groups Groupe Zbinden
Groupe Gisin
Project FNS: 200021_159592
(ISO format)
DO REGO MONTEIRO, Fernando Henrique et al. Heralded amplification of path entangled quantum states. In: Quantum Science and Technology, 2017, vol. 2, n° 2, p. 024008. https://archive-ouverte.unige.ch/unige:94656

56 hits



Deposited on : 2017-06-06

Export document
Format :
Citation style :