Editing Quark star (section)

==Characteristics==
Quark stars have some special characteristics that separate them from ordinary neutron stars. Under the physical conditions found inside neutron stars, with extremely high densities but temperatures well below 10<sup>12</sup> K, quark matter is predicted to exhibit some peculiar characteristics. It is expected to behave as a [[Fermi liquid]] and enter a so-called color-flavor-locked (CFL) phase of [[color superconductivity]], where "color" refers to the six "charges" exhibited in the [[strong interaction]], instead of the two charges (positive and negative) in [[electromagnetism]]. At slightly lower densities, corresponding to higher layers closer to the surface of the compact star, the quark matter will behave as a non-CFL quark liquid, a phase that is even more mysterious than CFL and might include color conductivity and/or several additional yet undiscovered phases. None of these extreme conditions can currently be recreated in laboratories so nothing can be inferred about these phases from direct experiments.<ref>{{cite journal |last1=Alford |first1=Mark G. |last2=Schmitt |first2=Andreas |last3=Rajagopal |first3=Krishna |last4=Schäfer |first4=Thomas |title=Color superconductivity in dense quark matter |arxiv=0709.4635 |journal=Reviews of Modern Physics |volume=80 |issue=4 |pages=1455–1515 |year=2008 |doi=10.1103/RevModPhys.80.1455 |bibcode=2008RvMP...80.1455A |s2cid=14117263 }}</ref>