In middle school 2 years ago, my science teacher was telling us of the 3 states of matter and one kid yelled out "What about plasma!". The teacher was like, oh yeah, plasma, but we're not going to be studying that. And I was like, what about Bose-Einstein Condensate, and he was like, "WTF is that?" (paraphrase). Good to know there are still more waiting to be found.
Thanks for the article!
There are more to add. Superfluid helium 3 and 4 have distinct behaviour quite different to normal fluids. The material of a quark star is a different state to any of the six listed in the first post, also. In addition, I am not entirely sure neutronium fits conveniently into one of the standard categories (such as solid). Or does it?
So I would be inclined to add other candidate states of matter:
Just realised that your "fermionic condensate" could have been referring to a more general class including the quark condensate found in quark stars. But I think it would matter a huge amount whether it was made of leptons or quarks (because the forces between them would be so different). With no attractive forces between electrons, and a lot of annihilation likely if you squash leptons and anti-leptons together (since even of different types, they all decay to electrons and positrons), it is probably impossible to have a lepton analog of a quark star, as gravity would not be enough to hold it together if there was even a slight charge imbalance.
On the other hand in a quark star, wouldn't the weak interaction would ensure there would be a lot of leptons around as well as quarks?
And I suppose the unique type of stable soup that you might end up with would be what is meant by a fermionic condensate? Or perhaps not!
P.S. After writing the above, I googled "fermionic condensate" and found it is a low termperature state of matter, not obviously connected with quark stars (which I think would generally be warm for a long time, and only very much later get to thermal equilibrium with their environment, i.e. the temperature of space). So I have 2 or 3 more states to add, listed at the top of this post.
Full article here: http://www.firstscience.com/home/articles/big-theories/a-new-form-of-matter-2-fermionic-condensates_1229.html
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Researchers have discovered a weird new phase of matter called fermionic condensates.
We learned it in grade school. There are three forms of matter: solids, liquids and gases.
But that's not even half right. There are at least six: solids, liquids, gases, plasmas, Bose-Einstein condensates, and a new form of matter called "fermionic condensates" discovered by NASA-supported researchers."