Can Induced Θ Vacua be Created in Heavy-Ion Collisions?

We discuss a phenomenon important to the development of the early Universe which may be experimentally testable in heavy-ion collisions. An arbitrary induced θ vacuum state should be created in heavy-ion collisions, similar to the creation of the disoriented chiral condensate. It should be a large domain with a wrong θ^ind≠0 orientation which will mimic the physics of the early Universe when it is believed that the fundamental parameter θ^fund≠0. We test this idea numerically in a simple model where we study the evolution of the phases of the chiral condensates in QCD with two quark flavors with nonzero θ^ind parameter. We see the formation of a nonzero θ^ind vacuum on a time scale of 10^-23s.