TY - JOUR
T1 - Coherent-state quantum key distribution without random basis switching
AU - Weedbrook, Christian
AU - Lance, Andrew M.
AU - Bowen, Warwick P.
AU - Symul, Thomas
AU - Ralph, Timothy C.
AU - Lam, Ping Koy
PY - 2006
Y1 - 2006
N2 - The random switching of measurement bases is commonly assumed to be a necessary step of quantum key distribution protocols. In this paper we present a no-switching protocol and show that switching is not required for coherent-state continuous-variable quantum key distribution. Further, this protocol achieves higher information rates and a simpler experimental setup compared to previous protocols that rely on switching. We propose an optimal eavesdropping attack against this protocol, assuming individual Gaussian attacks. Finally, we investigate and compare the no-switching protocol applied to the original Bennett-Brassard 1984 scheme.
AB - The random switching of measurement bases is commonly assumed to be a necessary step of quantum key distribution protocols. In this paper we present a no-switching protocol and show that switching is not required for coherent-state continuous-variable quantum key distribution. Further, this protocol achieves higher information rates and a simpler experimental setup compared to previous protocols that rely on switching. We propose an optimal eavesdropping attack against this protocol, assuming individual Gaussian attacks. Finally, we investigate and compare the no-switching protocol applied to the original Bennett-Brassard 1984 scheme.
UR - http://www.scopus.com/inward/record.url?scp=33144460763&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.73.022316
DO - 10.1103/PhysRevA.73.022316
M3 - Article
SN - 1050-2947
VL - 73
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 2
M1 - 022316
ER -