Efficient entanglement criteria beyond Gaussian limits using Gaussian measurements
Quantum Physics
2015-06-03 v1
Abstract
We present a formalism to derive entanglement criteria beyond the Gaussian regime that can be readily tested by only homodyne detection. The measured observable is the Einstein-Podolsky-Rosen (EPR) correlation. Its arbitrary functional form enables us to detect non-Gaussian entanglement even when an entanglement test based on second-order moments fails. We illustrate the power of our experimentally friendly criteria for a broad class of non-Gaussian states under realistic conditions. We also show rigorously that quantum teleportation for continuous variables employs a specific functional form of EPR correlation.
Cite
@article{arxiv.1201.5092,
title = {Efficient entanglement criteria beyond Gaussian limits using Gaussian measurements},
author = {Hyunchul Nha and Su-Yong Lee and Se-Wan Ji and M. S. Kim},
journal= {arXiv preprint arXiv:1201.5092},
year = {2015}
}
Comments
published version, 6 pages, 3 figures, including Supplemental Material