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26 September 2013 Implementation of an m-ary three-stage quantum cryptography protocol
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Abstract
This paper introduces an m-ary version of the Three-stage Quantum Cryptography protocol. The three-stage protocol was first proposed in 2006 and implemented in 2012. The m-ary version of the three-stage protocol proposed in this paper results in enhanced data transfer between a sender Alice and a receiver Bob since each pulse carries more than one bit of information. An experimental realization of the m-ary three-stage protocol is also reported in this paper. The implementation has used free-space optics as the transmission medium and passive optical components controlled through LabView. Furthermore, analytical results that address the impact of the noise factor and its trade-off with data rate are presented. This analysis includes a study of the probability of errors and channel capacity variations in terms of the noise variance factor for the m-ary three-stage protocol using two, four and eight levels. Limits within which the m-ary three-stage protocol can be used with higher performance efficiency compared to its original version counterpart are set.
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Mayssaa El Rifai, Nikhil Punekar, and Pramode K. Verma "Implementation of an m-ary three-stage quantum cryptography protocol", Proc. SPIE 8875, Quantum Communications and Quantum Imaging XI, 88750S (26 September 2013); https://doi.org/10.1117/12.2024185
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