Evaluation of entanglement measures by a single observable
Quantum Physics
2016-10-20 v4
Abstract
We present observable lower bounds for several bipartite entanglement measures including entanglement of formation, geometric measure of entanglement, concurrence, convex-roof extended negativity, and G-concurrence. The lower bounds facilitate estimates of these entanglement measures for arbitrary finite-dimensional bipartite states. Moreover, these lower bounds can be calculated analytically from the expectation value of a single observable. Based on our results, we use several real experimental measurement data to get lower bounds of entanglement measures for these experimentally realized states. In addition, we also study the relations between entanglement measures.
Cite
@article{arxiv.1506.01484,
title = {Evaluation of entanglement measures by a single observable},
author = {Chengjie Zhang and Sixia Yu and Qing Chen and Haidong Yuan and C. H. Oh},
journal= {arXiv preprint arXiv:1506.01484},
year = {2016}
}
Comments
10 pages, 4 figures