This was sort of the glossy science media version and I thought you were involved in the discussion it carried a lovely photo of the starwars light saber smile

http://www.natureworldnews.com/articles/4178/20130926/new-state-matter-created-fusing-photons.htm
http://www.independent.co.uk/news/scienc...rs-8841612.html

What they are doing is binding two or more photon behaviours together in a very different way than entanglement.

Wikipedia has a reference on the process now:
http://en.wikipedia.org/wiki/Photonic_molecule

This work was really an extension of earlier works to create super photons.
http://www.zmescience.com/science/physics/super-photons-bose-einstein-condensate-27112010/

The latest extension of these sorts of ideas is a new proposal to test Breit–Wheeler process and make matter directly from light.
http://www.theguardian.com/science/2014/may/18/matter-light-photons-electrons-positrons

It's all just standard QM with a bit of very clever thinking to setup challenging almost unnatural situations that produce some very strange results.

What is common to all the processes is micro-cavities with really exotic control of conditions.

So the bonus question answer was you can bind together photons in more unusual ways than entanglement and it may even be able to produce matter from it .... we will know in the near future.

Last edited by Orac; 05/07/15 05:47 AM.
I believe in "Evil, Bad, Ungodly fantasy science and maths", so I am undoubtedly wrong to you.