TY - JOUR
T1 - Higher-dimensional orbital-angular-momentum-based quantum key distribution with mutually unbiased bases
AU - Mafu, Mhlambululi
AU - Dudley, Angela
AU - Goyal, Sandeep
AU - Giovannini, Daniel
AU - McLaren, Melanie
AU - Padgett, Miles J.
AU - Konrad, Thomas
AU - Petruccione, Francesco
AU - Lütkenhaus, Norbert
AU - Forbes, Andrew
PY - 2013/9/5
Y1 - 2013/9/5
N2 - We present an experimental study of higher-dimensional quantum key distribution protocols based on mutually unbiased bases, implemented by means of photons carrying orbital angular momentum. We perform (d+1) mutually unbiased measurements in a classically simulated prepare-and-measure scheme and on a pair of entangled photons for dimensions ranging from d=2 to 5. In our analysis, we pay attention to the detection efficiency and photon pair creation probability. As security measures, we determine from experimental data the average error rate, the mutual information shared between the sender and receiver, and the secret key generation rate per photon. We demonstrate that increasing the dimension leads to an increased information capacity as well as higher key generation rates per photon. However, we find that the benefit of increasing the dimension is limited by practical implementation considerations, which in our case results in deleterious effects observed beyond a dimension of d=4.
AB - We present an experimental study of higher-dimensional quantum key distribution protocols based on mutually unbiased bases, implemented by means of photons carrying orbital angular momentum. We perform (d+1) mutually unbiased measurements in a classically simulated prepare-and-measure scheme and on a pair of entangled photons for dimensions ranging from d=2 to 5. In our analysis, we pay attention to the detection efficiency and photon pair creation probability. As security measures, we determine from experimental data the average error rate, the mutual information shared between the sender and receiver, and the secret key generation rate per photon. We demonstrate that increasing the dimension leads to an increased information capacity as well as higher key generation rates per photon. However, we find that the benefit of increasing the dimension is limited by practical implementation considerations, which in our case results in deleterious effects observed beyond a dimension of d=4.
UR - http://www.scopus.com/inward/record.url?scp=84884896043&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84884896043&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.88.032305
DO - 10.1103/PhysRevA.88.032305
M3 - Article
AN - SCOPUS:84884896043
SN - 1050-2947
VL - 88
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 3
M1 - 032305
ER -