This is a study of Non-Local Gauge Invariant Quantum Field Theory. Non-Local gauge invariance is an extension of the group of local gauge transformations that has been extensively used in construction of physical theories. We show how this larger group is rich enough to accommodate a new theory of gravity, and we propose a new model of unification of gravitational and electromagnetic, interactions. This new model of gravity has the advantage over the general relativity of being a quantizable theory. |