Unified field theories of bags and strings

Within the author's models of temporary quark confinement in field theoretical bags, he exhibits, in the tree approximation, string-like solutions. He argues that the bag-like and dual string-like pictures complement each other with the former describing the low-lying hadronic states and the latter the excited states of large angular momentum. When certain quantum fluctuation effects are included, one finds Regge trajectories, in a certain dynamical regime, to always approach straight lines in a (J, E/sup 2/) plane. (10 refs).