RT Journal Article
T1 Simple security proof of twin-field type quantum key distribution protocol
A1 Curty Alonso, Marcos
A1 Azuma, Koji
A1 Lo, Hoi-Kwong
K1 3325 Tecnología de las Telecomunicaciones
K1 2212.11 Fotones
K1 3311.04 Dispositivos Electroópticos
AB Twin-field (TF) quantum key distribution (QKD) was conjectured to beat the private capacity of a point-to-point QKD link by using single-photon interference in a central measuring station. This remarkable conjecture has recently triggered an intense research activity to prove its security. Here, we introduce a TF-type QKD protocol which is conceptually simpler than the original proposal. It relies on the pre-selection of a global phase, instead of the post-selection of a global phase, which significantly simplifies its security analysis and is arguably less demanding experimentally. We demonstrate that the secure key rate of our protocol has a square-root improvement over the point-to-point private capacity, as conjectured by the original TF QKD.
PB npj Quantum Information
SN 20566387
YR 2019
FD 2019-07-29
LK http://hdl.handle.net/11093/4010
UL http://hdl.handle.net/11093/4010
LA eng
NO npj Quantum Information, 5(1): 64 (2019)
NO Ministerio de Economía y Competitividad | Ref. TEC2014-54898-R
DS Investigo
RD 06-dic-2024