Anti-matter time doesn’t work the same way that matter time does (Amjor, Jurkiewicz, & Loll, 2008). Strange as it seems, the Feynman diagram of an electron colliding with an anti-electron shows the latter going backwards in our time (Figure 4.8), yet both the electron and anti-electron are entering the collision not leaving it.
Does this time reversal then reverse causality? Minkowski interpreted Einstein’s theory to let objects move in space-time dimensions, which allowed a block theory of time, where every event that ever was or will be can be paged like a book (Barbour, 1999). If time is a dimension, an entity going backwards in time reverses causality, but the anti-electron in Figure 4.8 is entering the collision just as the electron is, so there is no causal reversal. Assuming that time is a dimension then doesn’t explain how anti-matter time works.
Einstein concluded that every object in the universe has its own clock, so there is no space-time canvas upon which objects exist. In processing terms, every point in the network runs at its own rate, so time can vary. Time then ticks by for matter as clockwise cycles complete but for anti-matter, time ticks by as anti-clockwise cycles complete. Anti-matter then exists in anti-time as matter exists in time because its processing runs in reverse. It follows that to a matter entity, anti-matter runs time in reverse, but to the anti-matter entity, matter is running time in reverse. Matter exists by processing and anti-matter exists by anti-processing, so in both cases time passes as processing cycles complete.
Note that time can only run in reverse if it is virtual. This model then requires Feynman diagrams with two axes, one for matter and one for anti-matter. Time based on processing has a direction, so every entity in our universe has not only its own clock but also its own clock direction.
If time is virtual, can we reverse it, as the Back button of an Internet browser does? The browser back button can undo your last act, but it can’t undo interactions like online registrations. 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 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 runs anti-time between physical events, but it can no more undo a physical event 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.