1111.5048 (Michael I. Buchoff)

Finite isospin density probe for conformality    [PDF]

Michael I. Buchoff

A new method of employing an isospin chemical potential for QCD-like theories
with different number of colors, number of fermion flavors, and in different
fermion representations is proposed. The isospin chemical potential, which can
be simulated on the lattice due to its positive definite determinant gives a
means to probe both confining theories and IR conformal theories without
adjusting the lattice spacing and size. As the quark mass is reduced, the
isospin chemical potential provides an avenue to extract the chiral condensate
in confining theories through the resulting pseudoscalar condensate. For IR
conformal theories, the mass anomalous dimension can be extracted in the
conformal window through "finite density" scaling since the isospin chemical
potential is coupled to a conserved current. In both of these approaches, the
isospin chemical potential can be continuously varied for each ensemble at
comparable costs while maintaining the hierarchy between the lattice size and
lattice spacing. In addition to exploring these methods, finite volume and
lattice spacing effects are investigated.

View original: http://arxiv.org/abs/1111.5048