TY - JOUR
T1 - Large-alphabet quantum key distribution using spatially encoded light
AU - Tentrup, Tristan Bernhard Horst
AU - Luiten, W.M.
AU - van der Meer, Reinier
AU - Hooijschuur, Peter
AU - Pinkse, Pepijn W.H.
PY - 2019/12/18
Y1 - 2019/12/18
N2 - Most quantum key distribution protocols using a two-dimensional basis, such as HV polarization as first proposed by Bennett and Brassard in 1984, are limited to a key generation density of 1 bit per photon. We increase this key density by encoding information in the transverse spatial displacement of the used photons. Employing this higher-dimensional Hilbert space together with modern single-photon-detecting cameras, we demonstrate a proof-of-principle large-alphabet quantum key distribution experiment with 1024 symbols and a shared information between sender and receiver of 7 bit per photon.
AB - Most quantum key distribution protocols using a two-dimensional basis, such as HV polarization as first proposed by Bennett and Brassard in 1984, are limited to a key generation density of 1 bit per photon. We increase this key density by encoding information in the transverse spatial displacement of the used photons. Employing this higher-dimensional Hilbert space together with modern single-photon-detecting cameras, we demonstrate a proof-of-principle large-alphabet quantum key distribution experiment with 1024 symbols and a shared information between sender and receiver of 7 bit per photon.
U2 - 10.1088/1367-2630/ab5cbe
DO - 10.1088/1367-2630/ab5cbe
M3 - Article
SN - 1367-2630
VL - 21
JO - New journal of physics
JF - New journal of physics
M1 - 123044
ER -