DUAL GINZBURG-LANDAU THEORY AND QUARK NUCLEAR-PHYSICS

In Quark Nuclear Physics (QNP), where hadrons and nuclei are described in terms of quarks and gluons, confinement and chiral symmetry breaki ng are the most fundamental phenomena. The dual Ginzburg-Landau (DGL) theory, which contains monopole fields as the most essential degrees o f freedom and their condensation in the vacuum, is able to describe bo th phenomena. We discuss also the recovery of the chiral symmetry and the deconfinement phase transition at finite temperature in the DGL th eory. As for the connection to QCD, we study the instanton configurati ons in the abelian gauge a la 't Hooft. We find a close connection bet ween instantons and QCD monopoles. We demonstrate also the signature o f confinement as the appearance of long monopole trajectories in the M A gauge for the case of dense instanton configurations.