A lattice approach to QCD in the chiral regime

Non-perturbative lattice studies of QCD in the chiral thermodynamic regime, where chiral symmetry is spontaneously broken, require to deal with almost quark zero modes in a theoretically clean and computationally efficient way. We discuss the basic features and some realistic tests of a formulation, known as lattice tmQCD, that fulfills these requirements. Based on a talk given by R. Frezzotti at the conference HEP2001 (Budapest, July 2001)