shahryc, thanks for posting (and reposting) this story. It's some fascinating research. The paper in "<i>Physical Review Applied</i>" (linked in article) is
paywalled, but there is a pre-print version available here:<p><a href="http://arxiv.org/abs/1503.01493" rel="nofollow">http://arxiv.org/abs/1503.01493</a>