8-12 July 2013
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=13&confId=32"><font color=#ff0000>SAIP2013 PROCEEDINGS AVAILABLE</font></a>

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

9 Jul 2013, 17:40
Poster Presentation Track C - Photonics Poster1


Dr Angela Dudley (CSIR National Laser Centre)

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Main supervisor (name and email)<br>and his / her institution

Prof. Andrew Forbes, AForbes1@csir.co.za, CSIR National Laser Centre

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Abstract content <br> &nbsp; (Max 300 words)

We encode mutually unbiased bases (MUBs) using the higher-dimensional orbital angular momentum (OAM) degree of freedom associated with optical fields. We illustrate how these states are encoded with the use of a spatial light modulator (SLM). We demonstrate how (d+1)-mutually unbiased measurements can be made in both a classical prepare and measure scheme and on a pair of entangled photons. In the entanglement-based scheme we perform mutual unbiased measurements for dimensions ranging from d = 2 to 5. The calculation of the 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.

Primary author

Dr Angela Dudley (CSIR National Laser Centre)


Prof. Andrew Forbes (CSIR National Laser Centre) Mr Daniele Giovannini (Department of Physics and Astronomy, SUPA, University of Glasgow) Prof. Francesco Petruccione (UKZN) Ms Melanie McLaren (CSIR National Laser Centre) Mr Mhlambululi Mafu (UKZN) Prof. Miles Padgett (Department of Physics and Astronomy, SUPA, University of Glasgow) Prof. Norbert Lütkenhaus (Institute for Quantum Computing & Department for Physics and Astronomy, University of Waterloo) Dr Sandeep Goyal (UKZN) Prof. Thomas Konrad (UKZN)

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