text: The CFL phase has several remarkable properties.
  * It breaks chiral symmetry.
  * It is a superfluid.
  * It is an electromagnetic insulator, in which there is a "rotated" photon, containing a small admixture of one of the gluons.
  * It has the same symmetries as sufficiently dense hyperonic matter.
  There are several variants of the CFL phase, representing distortions of the pairing structure in response to external stresses such as a difference between the mass of the strange quark and the mass of the up and down quarks.