Some high level overviews: phys.org [1] and a detailed answer on physics.stackexchange [2]<p>[1] <a href="https://phys.org/news/2013-07-physicists-publish-solution-quantum-problem.html" rel="nofollow">https://phys.org/news/2013-07-physicists-publish-solution-qu...</a><p>[2] <a href="http://physics.stackexchange.com/a/71800" rel="nofollow">http://physics.stackexchange.com/a/71800</a>