So what you're saying is that gravifugal force is essentially the anti-matter for a graviton. I don't know many things about quantum theory but I do know this: in quantum theory, every particle has an anti-particle such as positrons. Secondly, to achieve the speed of light, one must have no mass (such as that of a beam or wave). Yet how are you supposed to achieve faster than light travels? Do you intend to reduce your mass into the negative region?