TY - JOUR
T1 - Feasibility of satellite quantum key distribution
AU - Bonato, C.
AU - Tomaello, A.
AU - Deppo, V. Da
AU - Naletto, G.
AU - Villoresi, P.
PY - 2009/4/30
Y1 - 2009/4/30
N2 - In this paper, we present a novel analysis of the feasibility of quantum key distribution between a LEO satellite and a ground station. First of all, we study signal propagation through a turbulent atmosphere for uplinks and downlinks, discussing the contribution of beam spreading and beam wandering. Then we introduce a model for the background noise of the channel during night-time and day-time, calculating the signal-to-noise ratio for different configurations. We also discuss the expected error-rate due to imperfect polarization compensation in the channel. Finally, we calculate the expected key generation rate of a secure key for different configurations (uplink, downlink) and for different protocols (BB84 with and without decoy states, entanglement- based Ekert91 protocol).
AB - In this paper, we present a novel analysis of the feasibility of quantum key distribution between a LEO satellite and a ground station. First of all, we study signal propagation through a turbulent atmosphere for uplinks and downlinks, discussing the contribution of beam spreading and beam wandering. Then we introduce a model for the background noise of the channel during night-time and day-time, calculating the signal-to-noise ratio for different configurations. We also discuss the expected error-rate due to imperfect polarization compensation in the channel. Finally, we calculate the expected key generation rate of a secure key for different configurations (uplink, downlink) and for different protocols (BB84 with and without decoy states, entanglement- based Ekert91 protocol).
UR - http://www.scopus.com/inward/record.url?scp=66449119929&partnerID=8YFLogxK
U2 - 10.1088/1367-2630/11/4/045017
DO - 10.1088/1367-2630/11/4/045017
M3 - Article
AN - SCOPUS:66449119929
SN - 1367-2630
VL - 11
JO - New Journal of Physics
JF - New Journal of Physics
M1 - 045017
ER -