Abstract

We consider how two physical realities can be represented over a common set of spacetime coordinates. As an example we will utilize quantum electrodynamics since this is a familiar and well-understood theory. We will designate one world the 'red' one and the other the 'green' one. We will try to show how they can interact in a physically plausible way. We will also examine whether such an interacting theory is renormalizable. It will be shown that we can extend these ideas to the Standard Model. There are implications for this theory if we consider General Relativity and these will be discussed briefly.