Nonlocality

Bohmian mechanics is about particles guided by a wave. This is new, but not revolutionary physics. This chapter will now present a paradigm shift. It is about how nature is, or better, it is about how any theory which aims at a correct description of nature must be. Any such theory must be nonlocal. We do not attempt to define nonlocality (see [1] for a serious examination of the notion), but simply take it pragmatically as meaning that the theory contains action at a distance in the true meaning of the words, i.e., faster than light action between spacelike separated events. Since we shall exemplify the idea shortly, this should suffice for the moment.