Secret quantum communication of a reference frame
Quantum Physics
2008-10-22 v2
Abstract
We propose quantum cryptographic protocols to secretly communicate a reference frame- unspeakable information in the sense it cannot be encoded into a string of bits. Two distant parties can secretly align their Cartesian axes by exchanging N spin 1/2 particles, achieving the optimal accuracy 1/N. A possible eavesdropper cannot gain any information without being detected.
Cite
@article{arxiv.quant-ph/0608042,
title = {Secret quantum communication of a reference frame},
author = {Giulio Chiribella and Lorenzo Maccone and Paolo Perinotti},
journal= {arXiv preprint arXiv:quant-ph/0608042},
year = {2008}
}
Comments
4 pages, no figures; published version