RT Journal Article
T1 Beating the repeaterless bound with adaptive measurement-device-independent quantum key distribution
A1 Trenyi, Róbert
A1 Azuma, Koji
A1 Curty Alonso, Marcos
K1 2209.05 Fibras Ópticas
K1 3307.07 Dispositivos láser
K1 3311.04 Dispositivos Electroópticos
K1 3325 Tecnología de las Telecomunicaciones
AB Surpassing the repeaterless bound is a crucial task on the way towards realizing long-distance quantum key distribution. In this paper, we focus on the protocol proposed by Azuma et al (2015 Nat. Commun. 6 10171), which can beat this bound with idealized devices. We investigate the robustness of this protocol against imperfections in realistic setups, particularly the multiple-photon pair components emitted by practical entanglement sources. In doing so, we derive necessary conditions on the photon-number statistics of the sources in order to beat the repeaterless bound. We show, for instance, that parametric down-conversion sources do not satisfy the required conditions and thus cannot be used to outperform this bound.
PB New Journal of Physics
SN 13672630
YR 2019
FD 2019-11-26
LK http://hdl.handle.net/11093/2274
UL http://hdl.handle.net/11093/2274
LA eng
NO New Journal of Physics, 21(11): 113052 (2019)
NO Agencia Estatal de Investigación | Ref. TEC2017-88243-R
DS Investigo
RD 06-dic-2024