Quantum Message Exchange Based on Entanglement and Bell-State Measurements
Abstract
We propose a scheme by which two parties can secretely and simultaneously exchange messages. The scheme requires the two parties to share entanglement and both to perform Bell-state measurements. Only two out of the four Bell states are required to be distinguished in the Bell-state measurements, and thus the scheme is experimentally feasible using only linear optical means. Generalizations of the scheme to high-dimensional systems and to multipartite entanglement are considered. We show also that the proposed scheme works even if the two parties do not possess shared reference frames.
Cite
@article{arxiv.quant-ph/0504182,
title = {Quantum Message Exchange Based on Entanglement and Bell-State Measurements},
author = {Sung Soon Jang and Hai-Woong Lee},
journal= {arXiv preprint arXiv:quant-ph/0504182},
year = {2009}
}
Comments
To be published in Physics Letters A; supersedes quant-ph/0407138. This version includes a fair amount of new material, including a section discussing the case of no shared reference frames