Quantum state discrimination
Quantum Physics
2008-10-14 v1
Abstract
It is a fundamental consequence of the superposition principle for quantum states that there must exist non-orthogonal states, that is states that, although different, have a non-zero overlap. This finite overlap means that there is no way of determining with certainty in which of two such states a given physical system has been prepared. We review the various strategies that have been devised to discriminate optimally between non-orthogonal states and some of the optical experiments that have been performed to realise these.
Cite
@article{arxiv.0810.1970,
title = {Quantum state discrimination},
author = {Stephen M. Barnett and Sarah Croke},
journal= {arXiv preprint arXiv:0810.1970},
year = {2008}
}
Comments
43 pages, submitted to Advances in Optics and Photonics