3/4-efficient Bell measurement with passive linear optics and unentangled ancillae
Quantum Physics
2014-10-08 v1
Abstract
It is well known that an unambiguous discrimination of the four optically encoded Bell states is possible with a probability of at best, when using static, passive linear optics and arbitrarily many vacuum mode ancillae. By adding unentangled single-photon ancillae, we are able to surpass this limit and reach a success probability of at least . We discuss the error robustness of the proposed scheme and a generalization to reach a success probability arbitrarily close to .
Cite
@article{arxiv.1403.4841,
title = {3/4-efficient Bell measurement with passive linear optics and unentangled ancillae},
author = {Fabian Ewert and Peter van Loock},
journal= {arXiv preprint arXiv:1403.4841},
year = {2014}
}
Comments
5+3 pages, 2 figures. Comments are welcome!