Abstract

Development in two way deterministic quantum cryptography protocols using qubits and qutrits have seen the nontrivial generalization of the protocol to accommodate the use of all mutually unbiased bases (MUB). Here we consider the extension of the protocols to qudits (quantum systems of d dimensional Hilbert space) and note the security as well as practical efficiencies. We conclude that a practical solution when scaling to higher dimensions would not include exploiting the use of all MUB.

© 2007 Optical Society of America