 Another claim that has become popular in recent years is that Bohmian mechanics is an Everettian, or “many worlds”, interpretation in disguise (see entry on  the many worlds interpretation of quantum mechanics  for an overview of such interpretations). The idea is that Bohmians, like Everettians, must take the wave-function as physically real. Moreover, since Bohmian mechanics involves no wave-function collapse (for the wave function of the universe), all of the branches of the wave function, and not just the one that happens to be occupied by the actual particle configuration, persist. These branches are those that Everettians regard as representing parallel worlds. As David Deutsch expresses the charge,