Separable states can be used to distribute entanglement
Quantum Physics
2009-11-10 v2
Abstract
We show that no entanglement is necessary to distribute entanglement; that is, two distant particles can be entangled by sending a third particle that is never entangled with the other two. Similarly, two particles can become entangled by continuous interaction with a highly mixed mediating particle that never itself becomes entangled. We also consider analogous properties of completely positive maps, in which the composition of two separable maps can create entanglement.
Cite
@article{arxiv.quant-ph/0302168,
title = {Separable states can be used to distribute entanglement},
author = {T. S. Cubitt and F. Verstraete and W. Dur and J. I. Cirac},
journal= {arXiv preprint arXiv:quant-ph/0302168},
year = {2009}
}
Comments
4 pages, 2 figures. Slight modifications