We propose an enhanced discrimination measurement for tripartite 3-dimensional entangled states in order to improve the discernible number of orthogonal entangled states. The scheme suggests 3-dimensional Bell state measurement by exploiting composite two 3-dimensional state measurement setups. The setup relies on state-of-the-art techniques, a multi-port interferometer and nondestructive photon number measurements that are used for the post-selection of suitable ensembles. With this scheme, the sifted signal rate of measurement-device-independent quantum key distribution using 3-dimensional quantum states is improved by up to a factor of three compared with that of the best existing setup.
@article{arxiv.1901.08717,
title = {Enhanced Bell state measurement for efficient measurement-device-independent quantum key distribution using 3-dimensional quantum states},
author = {Yonggi Jo and Kwangil Bae and Wonmin Son},
journal= {arXiv preprint arXiv:1901.08717},
year = {2019}
}