Encoding mutually unbiased bases in orbital angular momentum for quantum key distribution

Conference proceedings article

Authors / Editors

Mafu, Mhlambululi

Research Areas

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Publication Details

Author list: Dudley A, Mafu M, Goyal S, Giovannini D, McLaren M, Konrad T, Padgett MJ, Petruccione F, Lutkenhaus N, Forbes A

Publisher: Society of Photo-optical Instrumentation Engineers

Place: BELLINGHAM

Publication year: 2014

Journal: Proceedings of SPIE (0277-786X)

Journal acronym: PROC SPIE

Volume number: 8999

Number of pages: 9

eISBN: 978-0-8194-9912-7

ISSN: 0277-786X

eISSN: 1996-756X

Languages: English-Great Britain (EN-GB)

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Abstract

We encode mutually unbiased bases (MUBs) using the higher-dimensional orbital angular momentum (OAM) degree of freedom and illustrate how these states are encoded on a phase-only spatial light modulator (SLM). We perform (d - 1)-mutual unbiased measurements in both a classical prepare and measure scheme and on entangled photon pairs for dimensions ranging from d = 2 to 5. The calculated average error rate, mutual information and secret key rate show an increase in information capacity as well as higher generation rates as the dimension increases.

Keywords

mutually unbiased bases, orbital angular momentum, quantum key distribution, spatial light modulator

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