Optimal dimensionality for quantum cryptography

Details Optimal dimensionality for quantum cryptography Optimal dimensionality for quantum cryptography

2002-03-19

arxiv.org/abs/quant-ph/0203095v1

Optics and Spectroscopy 94, 691 (2003)

Physics

Quantum Physics

Revtex, 4 pages, 1 eps figure

Scientific paper

We perform a comparison of two protocols for generating a cryptographic key composed from d-valued symbols: one exploiting a string of independent qubits and another one utilizing d-level systems prepared in states belonging to d+1 mutually unbiased bases. We show that the protocol based on qubits is optimal for quantum cryptography, since it provides higher security and higher key generation rate.

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