Several theoretical Deterministic Secure Direct Bidirectional Communication protocols are generalized to improve their capacities by introducing the superdense-coding in the case of high-dimension quantum states.
Cite
@article{arxiv.quant-ph/0403230,
title = {Generalizing Several Theoretical Deterministic Secure Direct Bidirectional Communications to Improve Their Capacities},
author = {Z. J. Zhang and Z. X. Man},
journal= {arXiv preprint arXiv:quant-ph/0403230},
year = {2007}
}