Time doesn’t work the same way for matter and anti-matter (Amjor,Jurkiewicz, & Loll, 2008). Strange as it seems, the Feynman diagram of an electron hitting an anti-electron hits shows the latter enters the collision going backwards in time (Figure 4.8). Despite this, both the electron and anti-electron are entering the interaction not leaving it.
Does this reversal of time reverse causality? Minkowski took Einstein’s theory to mean that objects move on a time dimension, in a block theory of time where every event that ever was or will be can be paged like a book (Barbour,1999). Minkowski’s model has one time dimension, so an entity going backwards in time reverses causality, but the anti-matter particle in Figure 4.8 isn’t doing that. The anti-electron is entering the collision, just as the electron is, with no causal reversal, so Minkowski’s model doesn’t explain how anti-matter time works. If time is an absolute dimension, to reverse time is to travel back in time, which would deny the causality of physics.
Einstein concluded that every object in the universe has its own clock, so there is no space-time canvas upon which objects exist. A processing model explains this by saying that every point in the quantum network runs at its own rate, so time can vary.
Time then ticks by for matter it completes clockwise cycles, but time for anti-matter ticks by as it completes anti-clockwise cycles. Anti-matter then exists in anti-time as matter exists in time, where anti-time is our time running in reverse. It follows that to a matter being, anti-matter runs time in reverse, but to an anti-matter being, our matter runs time in reverse. If matter exists by processing and anti-matter exists by anti-processing, in both cases time passes as processing cycles complete.
Anti-matter can only run time in reverse if it is virtual. It follows that Feynman diagrams need two time axes, one for matter and one for anti-matter. A virtual time based on processing has two flavors, based on the processing direction. Thus, not only does every entity in our universe have its own clock, it also has its own clock direction.
But if time is virtual, can we rewind it, like an Internet browser with a Back button? We can’t, but even if we could, a browser back button can only undo your last act. It can’t undo interactions, like online registrations, as this would require both parties to undo, and with six degrees of separation, rolling back six events for one person could affect the entire web! Rolling back your time would then require the entire network to roll-back!
Neither time nor anti-time can be reversed, because a physical event is a reboot that can’t be undone. Anti-matter exists in anti-time between physical events, but it can no more undo its physical events than matter can. Time then can’t be reversed, rewound or fast-forwarded, whether by matter or anti-matter, so there is no time travel.