1211.5332 (Takuya Kanazawa et al.)

Banks-Casher-type relation for the BCS gap at high density    [PDF]

Takuya Kanazawa, Tilo Wettig, Naoki Yamamoto

We derive a new Banks-Casher-type relation which relates the density of complex Dirac eigenvalues at the origin to the BCS gap of quarks at high density. Our relation is applicable to QCD and QCD-like theories without a sign problem, such as two-color QCD and adjoint QCD with baryon chemical potential, and QCD with isospin chemical potential. It provides us with a method to measure the BCS gap through the Dirac spectrum on the lattice.

View original: http://arxiv.org/abs/1211.5332