Two High-Dimensional Cartesian Bases for Quantum Key Distribution

Tristan Bernhard Horst Tentrup, Willemijn Luiten, Peter Hooijschuur, Reinier van der Meer, Pepijn W.H. Pinkse

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review


Quantum Key Distribution (QKD) provides a secure way of generating shared cryptographic keys between a sender (Alice) and a receiver (Bob). The original BB84 protocol uses a two-dimensional polarization basis, limiting the information content of a single photon to 1 bit. Using the transverse position of single photons as one basis and the Fourier space as a second basis, one can construct a pair of mutually unbiased higher-dimensional bases. This improves not only the security of the protocol, but also the key generation rate. We present experimental results with a Spatial-Light-Modulator-based encoding scheme employing two nearly orthogonal alphabets with on the order of 103 symbols each and an information content of about 10 bit.
Original languageEnglish
Title of host publication2017 16th Workshop on Information Optics (WIO)
Place of Publication2017
Number of pages3
Publication statusPublished - 18 Sept 2017
EventWorkshop on Information optics (WIO) 2017 -
Duration: 3 Jul 20177 Jul 2017


ConferenceWorkshop on Information optics (WIO) 2017
Abbreviated titleWIO
Internet address


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