Quark-gluon "plasma" I understand that recently an estimated temperature of 5.5 trillion K was achieved at CERN. The phase state is described as a frictionless liquid. Is it still a plasma since the term continues to be used? Also, up to what temperature is QCD considered valid? http://blogs.nature.com/news/2012/0...ts-create-record-breaking-subatomic-soup.html EDIT: It seems QCD breaks down at 2 trillion K. Are there any quantum theories that are valid for quark-gluon plasmas if in fact they are true plasmas?.