In case you are interested, and as Science Mag explains, when nuclear matter is heated beyond 2 trillion degrees, it becomes a strongly coupled plasma of quarks and gluons. Experiments using highly energetic collisions between heavy nuclei have revealed that this new state of matter is a nearly ideal, highly opaque liquid. A description based on string theory and black holes in five dimensions has made the quark-gluon plasma an  archetypical strongly coupled quantum system. Open questions about the structure and theory of the quark-gluon plasma are  under active investigation. Many of the insights are also relevant to ultracold fermionic atoms and strongly correlated condensed  matter. There’s even more to the study of Hot Nuclear Matter which will be explained at Quark Matter 2012 as CERN and other physicists  gather in DC. America is represented. Surprised?

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