Characterizing quantumness via entanglement creation
Abstract
In [M. Piani et al., arXiv:1103.4032 (2011)] an activation protocol was introduced which maps the general non-classical (multipartite) correlations between given systems into bipartite entanglement between the systems and local ancillae by means of a potentially highly entangling interaction. Here, we study how this activation protocol can be used to entangle the starting systems themselves via entanglement swapping through a measurement on the ancillae. Furthermore, we bound the relative entropy of quantumness (a naturally arising measure of non-classicality in the scheme of Piani et al. above) for a special class of separable states, the so-called classical-quantum states. In particular, we fully characterize the classical-quantum two-qubit states that are maximally non-classical.
Cite
@article{arxiv.1105.3419,
title = {Characterizing quantumness via entanglement creation},
author = {Sevag Gharibian and Marco Piani and Gerardo Adesso and John Calsamiglia and Pawel Horodecki},
journal= {arXiv preprint arXiv:1105.3419},
year = {2013}
}
Comments
13 pages, 1 figure, submitted to special issue of IJQI