The Anti-Ferromagnetic Vacuum

Abstract

Certain effective vertices may generate a non-homogeneous, periodic vacuum structure. The excitations above such a vacuum are studied in the framework of the ${\varphi }^4$ and gauge models. The formation of the non-homogeneous vacuum is accompanied by the dynamical breakdown of the space-time inversion symmetry. Chiral transformation is introduced for bosons in close analogy with lattice fermions.

Talk presented at the workshop on "Quark Confinement and Hadron Spectrum, II", held in Como, Italy, June, 1996, 12pgs