Several hundred metals, compounds, alloys and ceramics possess the property of superconductivity at low temperatures.
The effect manifests itself in the Bethe–Weizsacker mass formula, the last pairing term of which describes the correlation energy of two nucleons.
[7][8] The BCS formalism is applicable without modifications to the description of quark matter with color group SU(2), where Cooper pairs are colorless.
The Nambu–Jona-Lasinio model predicts the existence of the superconducting phase of SU(2) color quark matter at high densities.
The possibility of modeling on the lattices of two-color QCD at finite chemical potentials for even numbers of the quark flavors is associated with the positive-definiteness of the integral measure and the absence of a sign problem.