There's also been some interesting prior work involving optics: http://phys.org/news/2012-09-scientists-renowned-uncertainty-principle.html http://phys.org/news

There's also been some interesting prior work involving optics: http://phys.org/news/2012-09-scientists-renowned-uncertainty-principle.html http://phys.org/news/2012-09-scientists-renowned-uncertainty...