RT Journal Article
T1 Long-distance device-independent quantum key distribution
A1 Zapatero Castrillo, Víctor
A1 Curty Alonso, Marcos
K1 3325 Tecnología de las Telecomunicaciones
K1 2210.23 Teoría Cuántica
K1 3311.04 Dispositivos Electroópticos
AB Besides being a beautiful idea, device-independent quantum key distribution (DIQKD) is probably the ultimate solution to defeat quantum hacking. Its security is based on a loophole-free violation of a Bell inequality, which results in a very limited maximum achievable distance. To overcome this limitation, DIQKD must be furnished with heralding devices like, for instance, qubit amplifiers, which can signal the arrival of a photon before the measurement settings are actually selected. In this way, one can decouple channel loss from the selection of the measurement settings and, consequently, it is possible to safely post-select the heralded events and discard the rest, which results in a significant enhancement of the achievable distance. In this work, we investigate photonic-based DIQKD assisted by two main types of qubit amplifiers in the finite data block size scenario, and study the resources—particularly, the detection efficiency of the photodetectors and the quality of the entanglement sources—that would be necessary to achieve long-distance DIQKD within a reasonable time frame of signal transmission.
PB Scientific Reports
SN 20452322
YR 2019
FD 2019-11-28
LK http://hdl.handle.net/11093/3004
UL http://hdl.handle.net/11093/3004
LA eng
NO Scientific Reports, 9(1): 17749 (2019)
NO Ministerio de Economía y Competitividad | Ref. TEC2014-54898-R
DS Investigo
RD 09-oct-2024