TY - JOUR
T1 - Entangled-photon six-state quantum cryptography
AU - Enzer, Daphna G.
AU - Hadley, Phillip G.
AU - Hughes, Richard J.
AU - Peterson, Charles G.
AU - Kwiat, Paul G.
PY - 2002/7/12
Y1 - 2002/7/12
N2 - We have implemented the 'six-state' quantum cryptography protocol using polarization-entangled photon pairs, in which the polarization of each photon of a pair is measured in one of three randomly chosen bases. For a given amount of eavesdropping, this protocol results in a larger error rate than in four- or two-state protocols, but reduces the number of key-producing events. We have experimentally investigated several incoherent eavesdropping strategies, and verified the predicted enhancement in error rate. However, we demonstrate that for low error rates, the efficiency for secret key generation is higher when using the four-state protocol.
AB - We have implemented the 'six-state' quantum cryptography protocol using polarization-entangled photon pairs, in which the polarization of each photon of a pair is measured in one of three randomly chosen bases. For a given amount of eavesdropping, this protocol results in a larger error rate than in four- or two-state protocols, but reduces the number of key-producing events. We have experimentally investigated several incoherent eavesdropping strategies, and verified the predicted enhancement in error rate. However, we demonstrate that for low error rates, the efficiency for secret key generation is higher when using the four-state protocol.
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U2 - 10.1088/1367-2630/4/1/345
DO - 10.1088/1367-2630/4/1/345
M3 - Article
AN - SCOPUS:1242330596
SN - 1367-2630
VL - 4
SP - 45.1-45.8
JO - New Journal of Physics
JF - New Journal of Physics
M1 - 345
ER -