Higher-dimensional orbital-angular-momentum-based quantum key distribution with mutually unbiased bases

Mafu, M., Dudley, A., Goyal, S., Giovannini, D., McLaren, M., Padgett, M.J. , Konrad, T., Petruccione, F., Lütkenhaus, N. and Forbes, A. (2013) Higher-dimensional orbital-angular-momentum-based quantum key distribution with mutually unbiased bases. Physical Review A: Atomic, Molecular and Optical Physics, 88(3), (doi:10.1103/PhysRevA.88.032305)

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Publisher's URL: http://dx.doi.org/10.1103/PhysRevA.88.032305

Abstract

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 fromd = 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.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Padgett, Professor Miles and Giovannini, Dr Daniel
Authors: Mafu, M., Dudley, A., Goyal, S., Giovannini, D., McLaren, M., Padgett, M.J., Konrad, T., Petruccione, F., Lütkenhaus, N., and Forbes, A.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review A: Atomic, Molecular and Optical Physics
Publisher:American Physical Society
ISSN:1050-2947
ISSN (Online):1094-1622

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
549871Challenges in Orbital Angular MomentumMiles PadgettEngineering & Physical Sciences Research Council (EPSRC)EP/I012451/1P&A - PHYSICS & ASTRONOMY